Accessibility: Cables editor should not take over TAB key by default

[TobyKLight]

Currently the cables.gl editor uses TAB to open the 'create op' dialog.

Obviously this is a standard hotkey now in use by a lot of cables.gl users, but unfortunately TAB is one of the core keyboard functions needed for accessibility, normally cycling through all the interactive elements on a page.

This series of feature requests is not about making the cables editor more accessible per se. BUT having TAB blocked makes extra friction if you want to test that the patch you make in cables.gl is itself accessible. You have to open it in a different window to test accessibility which is annoying.

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Proposal:

• TAB for opening the 'create op' dialog is grandfathered and made an option in user account.
• Existing users keep existing functionality, can disable it from user account settings.
• New users have it disabled by default.

[pandrr]

this is already gone on dev.cables.gl

there is now an input field for the opselect key.
by default it is only "escape" it can be set as "escape,tab"

more possibilities for user to define keybindings will be added and improved in the future

[pandrr]

also on dev.cables.gl in modal dialogs you can now use the tab key to navigate buttons. we will improve on all of this

[steam0r]

this made it to cables.gl with the latest release, just now!