User:Windymilla/Manual updates for 1.2

1. Autosave: Right click on save icon used to set a repeating autosave timer, but it didn't turn the autosave flag on. I think it was intended as a "reset the timer" option, if you didn't want it to save just now. However, it still did that even if autosave was off. So now, it does nothing if autosave is off, and just resets the timer if it is on. New text for manual:
   Background is green when Autosave is enabled, and flashes yellow for several seconds before an autosave begins. Right-click to reset the autosave timer to start counting again. Shift-right-click (Mac: shift-ctl-click) to toggle the autosave option on/off (or use the option in the Preferences menu).