Restore DEV-12255 patch

Refresh the snapshot when calling show after instance exists (IE: Via Keyboard shortcut)
Should never have been removed in the first place, the purpose of 7faa19b29792b558a50b1da2bdfc483f6cc839dd was to have an explicit click to refresh, this patch requires an explicit click.
This does NOT break keeping the same snapshot while switching settings
Snapshot floater aesthetics

Restores the cancel button with new functionality! In Freeze mode, it will exit freeze! Otherwise it will just close the floater as it used to do.
Lines up everything nicely, and removes overly complex tool tips.
Does not change or remove any existing functionality.
Fix Issue 689: ATTACH_NECK and ATTACH_AVATAR_CENTER are missing strings
More UI warnings fixup stuffs