Consider some helpers for Sublime Merge integration

[FichteFoll]

Sublime Merge uses the same core as Sublime Text, which means basically all resource file types are shared.

I haven't spent too much about how support for Merge could look like, but I'm certain there is something to be done. Suggestions welcome.

[FichteFoll]

Merge also has different attributes and classes for theming and different settings.

[TerminalFi]

In spirit of tracking down settings specific to Merge

• render_commit_dialog_message_at_top
• side_bar_layout
• time_format
• log_control_tree

[OdatNurd]

@TheSecEng In addition to log_control_tree, Merge also supports log_input and log_commands as well.

[FichteFoll]

Raising priority for this to be included in the next minor update. It's so annoying to view or modify anything from SM that just the thought of it almost single-handedly discourages me from even starting to change something.

Better integration into ST via PC would certainly help a lot with that.