"Create Preset" enhancements

[apohl79]

Discussed in #1259

^{Originally posted by Karl-Franz August 17, 2023}
These are just "quality of life" requests. Apologies if these have already been discussed or proposed:

• Cmd/Ctrl-N keyboard shortcut to Create a New preset
• Set cursor focus on Preset Name edit field when Create New Preset dialog opens so you can start typing name right away
• Remember last used preset folder when Create New Preset dialog opens rather going to root preset folder each time