Replace another green loading gif with a grayscale one, by @mindeffects
Fix small glitch in nested tabs as seen in MIGX, bug introduced with the scrolling-fix for normal tabs
Fix JS error because of different mask objects in windows, reproduce by dropping a chunk in resource content
Fix excessive padding in quick update windows with tabs
Fix Element Tree windows / formfield widths
Fix scrollbars in the two different window types (plain / with tabs)
Make browser window height dynamic from viewport, make buttons consistent
Normalize windows, prevent oversized windows in smaller viewports, tested all windows again
Fix issue with duplicate method declarations in phpthumb.class.php
Get rid of weird character in phpthumb class
Fix grid mask overlapping topnav dropdowns, see #11711
Fix missing padding on TV panel > input properties, additional TV input props
Make sure fieldsets always have border-radius
Fix scrollbar issues in treedrop window
Various manager theme improvements

Merge remote-tracking branch 'origin/pr/11699'

* origin/pr/11699:
  Make sure fieldsets always have border-radius
  Fix missing padding on TV panel > input properties, additional TV input props
  Fix grid mask overlapping topnav dropdowns, see #11711
  Fix small glitch in nested tabs as seen in MIGX, bug introduced with the scrolling-fix for normal tabs
  Replace another green loading gif with a grayscale one, by @mindeffects
More UI improvements

Merge remote-tracking branch 'origin/pr/11703'

* origin/pr/11703:
  Fix scrollbar issues in treedrop window
  Normalize windows, prevent oversized windows in smaller viewports, tested all windows again
  Make browser window height dynamic from viewport, make buttons consistent
  Fix scrollbars in the two different window types (plain / with tabs)
  Fix Element Tree windows / formfield widths
  Fix excessive padding in quick update windows with tabs
  Fix JS error because of different mask objects in windows, reproduce by dropping a chunk in resource content
Correct duplicate method declarations in phpthumb class [#11700]

Merge remote-tracking branch 'origin/pr/11712'

* origin/pr/11712:
  Get rid of weird character in phpthumb class
  Fix issue with duplicate method declarations in phpthumb.class.php