Multiple issues with Content Revision Tracking [5.2.0-B3]

We've introduced Content Revision Tracking in 5.2.0-B1 (

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).

After that we've been using it actively on our own projects and several things popped up:

clicking on "History" toolbar button icon (but not text) haven't opened page revision history
on a long pages scrolling page down resulted in content toolbar scrolled away too (should have stayed in top left corner as at the beginning)
on a long pages scrolling page down resulted in "users a,b are also editing this page" message scrolled away too (should have stayed in top left corner as at the beginning)
on a long pages scrolling page down resulted in opened history dropdown scrolled away too (should have stayed in top left corner as at the beginning)
text under content revision toolbar disabled buttons was same color as for enabled buttons (should have been gray, like for rest admin console)

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