enhancement: more keyboard shortcuts

[robertvazan]

Is your feature request related to a problem? Please describe.
It's a bit subjective, but current selection of shortcuts is a poor fit. There's a shortcut for settings, which are rarely accessed and not keyboard-friendly anyway. On the other hand, I often edit the last prompt instead of asking followup questions and there's no shortcut to start editing it and no shortcut to submit changes.

There are no shortcuts in the new Playground either, which makes it impossible to use the playground in the streamlined fashion described in #987. Notice the wide range of shortcuts in NovelAI (although NovelAI made the mistake of using Alt, which is impractical on keyboards that replace right Alt with AltGr).

Current WebUI shortcuts use three-key combinations, which are usually only used in text editors with several dozen shortcuts. Simpler two-key shortcuts should be used whenever possible.

Describe the solution you'd like
Maybe collect a list of the most common workflows and optimize shortcuts for them, preferring the more ergonomic shortcuts for the most frequent actions.

[ddegner]

I can't find the keyboard shortcuts. But in the same vein, I would love a shortcut for "New chat".

[robertvazan]

@ddegner You are not alone: #1007. Look at the bottom right corner of the screen.

[MatthewK78]

There's another keyboard shortcut that I absolutely love in OpenAI's Playground interface -- [Ctrl]+[Enter] to Submit, no matter where you are (e.g. editing previous replies). Having to move my hands away from the keyboard in order to manually click Submit slows me down.

[nilsherzig]

Having escape close the current window (i.e. settings) and return also work on tags and other small input fields would be nice

[tjbck]

@nilsherzig Added to our dev branch!