Changes

* Hide pointer cursor when touch screen interaction is occurring, reveal if/when mouse or trackpad is used

* Hide pointer cursor when touch screen interaction is occurring, reveal if/when mouse or trackpad is used

* Palette hover/click behaviours

* Palette hover/click behaviours

** Single touch should _not_ trigger hover delay palette content (to prevent toolbar palettes and help hints obscuring UI after use)

** Single tap of a button with a primary action should _not_ trigger hover delay palette content (to prevent toolbar palettes and help hints obscuring UI after use)

** Touch and hold should trigger hover delayed palette content (like a right click)

** Touch and hold _should_ trigger full display of palette content (like a right click, no extra delay)

** Tapping an icon with no primary action should instantly open the full menu/palette, no delay (e.g. Frame right edge buddy icon)

* Hide all keyboard shortcut accelerators when booting on touch only devices

* Hide all keyboard shortcut accelerators when booting on touch only devices

* Make toolbar overflow drop-down widget a standard sugar toolbutton width to allow easier access

* Make toolbar overflow drop-down widget a standard sugar toolbutton width to allow easier access