Followup to own r60700, fix was not correct... In fact, beahivor of expanded enums is not consistent with other properties, as there labels are never shown. Keep it for now, though, as this would break many scripts and ui file, better to do this in bulk!

Thanks to DingTo and plasmasolutions for notifying the issue.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@60702 954f8c5b-7b00-dc11-b283-0030488c597c
Fix #37047, Expanded Enum Alignment glitching.
The enum item buttons in the node header change their alignr when switching the tree type, due to different things being shown in the header (this rarely happens in other panels, so it doesn't turn
up easily). The new alignnr needs to be copied to existing block buttons in ui_but_update_from_old_block to ensure the enum items get aligned to each other.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@60703 954f8c5b-7b00-dc11-b283-0030488c597c