mx-widget: use the long-press-timeout value from MxSettings
mx-widget: use the long-press-timeout value from MxSettings

MxWidget can now use the value from MxSettings, rather than a hard coded
value.

Fixes: http://bugzilla.moblin.org/show_bug.cgi?id=9526
  Bug 9526 - [widget] Make the timeout value for long-press configurable

clutter-project/mx,clutter-project/mx,jonnylamb/mx,jonnylamb/mx,pwithnall/mx,jonnylamb/mx,pwithnall/mx,pwithnall/mx,clutter-project/mx,clutter-project/mx,pwithnall/mx,jonnylamb/mx