Instead of loading RevisionSlider only add a little button
to expand RevisionSlider on top of the diff page.
This makes RevisionSlider only steal a bit of space over the
diff, and only inserts quite a big slider to users that want
to have it visible for the particular diff.
API calls are only made once RevisionSlider has been expanded.
This is re-submit of b0f229d75f
that was reverted in I26427faaa00b38c2aa1377a66224c9062dcca302.
Bug: T141871
Change-Id: I879de5774b2cce7b908e73cbbe869fd48d6afa23
Instead of loading RevisionSlider only add a little button
to expand RevisionSlider on top of the diff page.
This makes RevisionSlider only steal a bit of space over the
diff, and only inserts quite a big slider to users that want
to have it visible for the particular diff.
API calls are only made once RevisionSlider has been expanded.
Bug: T141871
Change-Id: Ib312f6225b85b9ebdf4ac5d16e254a57d5cf6411