hamburger menu: connect "help" (current greyed out) to KeyHelp dialog, forced to first tab
there are (at least) three places we have help buttons:
- menu -> help: currently greyed out, this should always go to first-tab of KeyHelp (with animation, and eventually links to docs)
- menu -> show shortcut keys: this should always go to 2nd-tab of KeyHelp (first tab with keys).
- newish "Key Help" on main UI: this is ambiguous, perhaps deliberately so. What should it do?
For 3, how about: in first instance, we open the first tab ("Tip n Tricks", with animation), later openings to go edit keys (2nd tab). But that is complicated, maybe easier to send 3 same as 1, always to first tab.
At least do the easy thing for v0.10. And most importantly, enable menu -> help.