I can use F12 to jump to project tree (if it was the last tool that I used), but is there a shortcut for jumping back to editor?
This is definitely a workaround, but, on mac os the following keystrokes work,
[ SHIFT + CMD + A ] > type "edit" > [ ENTER ]
So, I created a Service using Automator as follows,
Then I mapped the Service via "System Preferences > Keyboard > Shortcuts > Services" to
[ CTRL + OPTION + CMD + i ]
The Automator Service, contains the following AppleScript,
on run {input, parameters}
tell application "System Events"
keystroke "A" using {shift down, command down}
delay 0.2
keystroke "edit"
delay 0.2
keystroke return
end tell
return input
end run