Adds drop-down menu to select size of tiles, in addition to + and -
Updates styles for the new tile size menu
Rearranges tile resizing buttons. Refs: #4462
Adds some left spacing for save button on resize overlay. Refs: #4462
Merge remote-tracking branch 'origin/develop' into feature-sections

* origin/develop:
  Adds some left spacing for save button on resize overlay. Refs: #4462
  Rearranges tile resizing buttons. Refs: #4462
  Updates styles for the new tile size menu
  Adds drop-down menu to select size of tiles, in addition to + and -