ChangeScreen2: Disable Ctrl-Enter while 'Post' is disabled

Ctrl-Enter is the keyboard shortcut for the 'Post' button,
which is temporarily disabled at open while draft comments
are loaded into the box and the input object.

Commit bb50707f0cd43931011f246fdfdaaff76f7ddf48 modified the Post
button to be disabled until the drafts are loaded. If post happens
before this finishes the drafts are not sent, but the user probably
wants them included.

Change-Id: I0fc5009d4dd89ab91e95c4e197146a4b05f830af
Fix coloring of links to external groups

The Settings > Groups page used two different colors for the links to
groups. External groups were colored with the wrong text color as
the elements use class gwt-Anchor, not gwt-InlineHyperlink.

Change-Id: I3ba096003138b0f5309ef39dd24f44b65d4e5df2
Merge "ChangeScreen2: Disable Ctrl-Enter while 'Post' is disabled"