Reselect last-used preset, if possible

If a user inserts a preset using the templater, let's make that easy by
recalling it if there is an exact match.
Basic TTS support on context menus

This currently works from the reviewer only and does not intelligently
detect whether there are actually TTS tags present or not.
On-demand TTS support for templater dialog

This should be helpful for users with complex templates, also fixing the
way windows are found (should be more reliable).