Merge pull request #6312 from RosettaCommons/roccomoretti/interactive_help_hotkey
[Foldit] Add context-sensitive help
The way it works is that if something has context sensitive help, it will be notated with a small icon in the tooltip. Then, if the tooltip is open, pressing the help hotkey (default F1 or alt-H) will bring up the help menu, but will automatically open the help menu with the corresponding help topic already pulled up. (The topic to be open is specified when creating the tooltip.)
Right now it's only implemented for the action buttons, though the way it's implemented is such that the icon always appears for all actions. (All float menu buttons.) -- We can also put help info on other GUI elements - basically, anything which has a tooltip is a candidate.
RELEASE NOTES: Add context sensitive help. Some GUI elements now have little question mark icons in their tooltips, which indicates there's a corresponding help page. Pressing the Help hotkey (default "F1" or "Alt-H") when the tooltip is open will take you directly to that help page.