gr-settings-view: Prevent content overflowing outside

Currently (most reproducible on mobile) when the content is bigger
then the screen, it'll overflow outside rather then having scrollbars
within.

We fix this by adding `overflow: auto` to gr-settings-view which
contains the content within rather then overflowing outside.

Release-Notes: skip
Change-Id: I8e817a1ca58250f5390e475190c8d6585ef6cfdf
diff --git a/polygerrit-ui/app/elements/settings/gr-settings-view/gr-settings-view.ts b/polygerrit-ui/app/elements/settings/gr-settings-view/gr-settings-view.ts
index e1ce5cc..dfa1271 100644
--- a/polygerrit-ui/app/elements/settings/gr-settings-view/gr-settings-view.ts
+++ b/polygerrit-ui/app/elements/settings/gr-settings-view/gr-settings-view.ts
@@ -252,6 +252,7 @@
       css`
         :host {
           color: var(--primary-text-color);
+          overflow: auto;
         }
         h2 {
           font-family: var(--header-font-family);