Improve the group reviewer messages slightly.

Change-Id: I3ce9f1d9117b8fa47a6566317f91c99e98d7a8c0
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeConstants.properties b/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeConstants.properties
index 9223d2e..ae60c84 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeConstants.properties
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeConstants.properties
@@ -58,7 +58,7 @@
 approvalTableRemoveNotPermitted = Not allowed to remove reviewer
 approvalTableCouldNotRemove = Could not remove reviewer
 approvalTableAddReviewerHint = Name or Email or Group
-approvalTableAddManyReviewersConfirmationDialogTitle = Adding many reviewers
+approvalTableAddManyReviewersConfirmationDialogTitle = Adding Group Members as Reviewers
 
 changeInfoBlockOwner = Owner
 changeInfoBlockProject = Project
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeMessages.properties b/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeMessages.properties
index d41b6e6..40088a1 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeMessages.properties
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeMessages.properties
@@ -35,9 +35,9 @@
 reviewerNotFound = {0} is neither a registered user nor a group.
 accountInactive = {0} is not an active user.
 changeNotVisibleTo = {0} cannot access the change.
-groupIsEmpty = {0} has no members.
-groupIsNotAllowed = {0} cannot be added as reviewer.
-groupHasTooManyMembers = {0} has too many members.
-groupManyMembersConfirmation = {0} has {1} members. Do you want to add them all as reviewers?
+groupIsEmpty = The group {0} does not have any members to add as reviewers.
+groupIsNotAllowed =  The group {0} cannot be added as reviewer.
+groupHasTooManyMembers = The group {0} has too many members to add them all as reviewers.
+groupManyMembersConfirmation = The group {0} has {1} members. Do you want to add them all as reviewers?
 
 anonymousDownload = Anonymous {0}