Excludes suicide from the action menu unless bound, Zoom unless tiles. Makes menu sticky.

* Excludes suicide from the action menu unless bound
my friends and i dont play with suicide bound and the added check has the menu respect that choice.

* Removes the Zoom In/Out options unless the use_tiles flag is set
there was no need for these to show otherwise

* has the sub-menus return to the main menu on Esc.
raison for the last one being that this small change lets you use one activation to explore your entire key/command space at a glance. This should make it easier for new players to discover their options.