Add Tab Tree “focus last active tab” features

[ariasuni]

• Focus last active tab when clicking on currently focused tab (Fix #263)
• Add option to switch to last active tab when closing current tab

[eoger]

Sorry I think this feature is too niche for me to accept.
Like I said in https://github.com/eoger/tabcenter-redux/issues/263#issuecomment-347055961, maybe a JS api that power-users could use to add alter the extension behavior (ala CSS editor) would be the answer.

[ariasuni]

Are you interested by this particular change?

Note: now a tab is focused on click release instead of press, so moving a tab doesn’t change focus

[eoger]

Sorry about the delay, IIUC the current native Firefox behavior is to focus the tab on mousedown, which is what we are doing currently.

[ariasuni]

I couldn’t make the code work with the current version, and I don’t understand most of the code so I guess I won’t work on it anymore.

In the meantime, I developed Tab Flip for Tree Style Tab, an addon that add this feature to Tree Style Tab.