Index colors of screenshots in review UI documentation

For most screenshots the colors were already indexed but some still
had the full color palette. Indexing the colors makes the pictures
much smaller and thus faster to load.

Change-Id: I7c87c8372c34e249b609c497aab602bcf501ee74
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
diff --git a/Documentation/images/user-review-ui-change-screen-change-info-actions.png b/Documentation/images/user-review-ui-change-screen-change-info-actions.png
index 0ee3d17..fd17d27 100644
--- a/Documentation/images/user-review-ui-change-screen-change-info-actions.png
+++ b/Documentation/images/user-review-ui-change-screen-change-info-actions.png
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diff --git a/Documentation/images/user-review-ui-change-screen-change-info-labels.png b/Documentation/images/user-review-ui-change-screen-change-info-labels.png
index 9829efa..2655089 100644
--- a/Documentation/images/user-review-ui-change-screen-change-info-labels.png
+++ b/Documentation/images/user-review-ui-change-screen-change-info-labels.png
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diff --git a/Documentation/images/user-review-ui-change-screen-change-info-last-update.png b/Documentation/images/user-review-ui-change-screen-change-info-last-update.png
index 7b9b95f..93c296a 100644
--- a/Documentation/images/user-review-ui-change-screen-change-info-last-update.png
+++ b/Documentation/images/user-review-ui-change-screen-change-info-last-update.png
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diff --git a/Documentation/images/user-review-ui-change-screen-change-info-owner.png b/Documentation/images/user-review-ui-change-screen-change-info-owner.png
index 5bd18a1..3d73ef7 100644
--- a/Documentation/images/user-review-ui-change-screen-change-info-owner.png
+++ b/Documentation/images/user-review-ui-change-screen-change-info-owner.png
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diff --git a/Documentation/images/user-review-ui-change-screen-change-info-project-branch-topic.png b/Documentation/images/user-review-ui-change-screen-change-info-project-branch-topic.png
index 17cd061..acba408 100644
--- a/Documentation/images/user-review-ui-change-screen-change-info-project-branch-topic.png
+++ b/Documentation/images/user-review-ui-change-screen-change-info-project-branch-topic.png
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diff --git a/Documentation/images/user-review-ui-change-screen-change-info-submit-strategy.png b/Documentation/images/user-review-ui-change-screen-change-info-submit-strategy.png
index 2221000..abc1239 100644
--- a/Documentation/images/user-review-ui-change-screen-change-info-submit-strategy.png
+++ b/Documentation/images/user-review-ui-change-screen-change-info-submit-strategy.png
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diff --git a/Documentation/images/user-review-ui-change-screen-change-info.png b/Documentation/images/user-review-ui-change-screen-change-info.png
index 8d0dc7c..e92b49d 100644
--- a/Documentation/images/user-review-ui-change-screen-change-info.png
+++ b/Documentation/images/user-review-ui-change-screen-change-info.png
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diff --git a/Documentation/images/user-review-ui-change-screen-commit-info.png b/Documentation/images/user-review-ui-change-screen-commit-info.png
index ee2585b..fe0c1d1 100644
--- a/Documentation/images/user-review-ui-change-screen-commit-info.png
+++ b/Documentation/images/user-review-ui-change-screen-commit-info.png
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diff --git a/Documentation/images/user-review-ui-change-screen-commit-message.png b/Documentation/images/user-review-ui-change-screen-commit-message.png
index 5385a82..acc78aa 100644
--- a/Documentation/images/user-review-ui-change-screen-commit-message.png
+++ b/Documentation/images/user-review-ui-change-screen-commit-message.png
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diff --git a/Documentation/images/user-review-ui-change-screen-history.png b/Documentation/images/user-review-ui-change-screen-history.png
index d88623e..b28e693 100644
--- a/Documentation/images/user-review-ui-change-screen-history.png
+++ b/Documentation/images/user-review-ui-change-screen-history.png
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diff --git a/Documentation/images/user-review-ui-change-screen-inline-comments.png b/Documentation/images/user-review-ui-change-screen-inline-comments.png
index 170d568..a10f40a 100644
--- a/Documentation/images/user-review-ui-change-screen-inline-comments.png
+++ b/Documentation/images/user-review-ui-change-screen-inline-comments.png
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diff --git a/Documentation/images/user-review-ui-change-screen-patch-set-list.png b/Documentation/images/user-review-ui-change-screen-patch-set-list.png
index 702bf4f..ef03135 100644
--- a/Documentation/images/user-review-ui-change-screen-patch-set-list.png
+++ b/Documentation/images/user-review-ui-change-screen-patch-set-list.png
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diff --git a/Documentation/images/user-review-ui-change-screen-permalink.png b/Documentation/images/user-review-ui-change-screen-permalink.png
index 502b17c..a1aede9 100644
--- a/Documentation/images/user-review-ui-change-screen-permalink.png
+++ b/Documentation/images/user-review-ui-change-screen-permalink.png
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diff --git a/Documentation/images/user-review-ui-change-screen-related-changes-indicators.png b/Documentation/images/user-review-ui-change-screen-related-changes-indicators.png
index 9479235..d0a997e 100644
--- a/Documentation/images/user-review-ui-change-screen-related-changes-indicators.png
+++ b/Documentation/images/user-review-ui-change-screen-related-changes-indicators.png
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diff --git a/Documentation/images/user-review-ui-change-screen.png b/Documentation/images/user-review-ui-change-screen.png
index 22fffaa..8952cac 100644
--- a/Documentation/images/user-review-ui-change-screen.png
+++ b/Documentation/images/user-review-ui-change-screen.png
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