- modified mesh loading ui :
 * added new loading bar progress indicator based on paper-progress
 * commented out old loaders for now (too intrusive, not sleek enough)

- made zooming on object behaviour optional:
 * added parameter & handling
 * added option in settings ui
 * added double click (should be tap) based zooming

- improved properties ui :
 * added absolute scale display
 * added databinding between relative & absolte scaling
 * added face & vertices count display (wip, cannot handle composites
as it is)
 * added tooltips
 * styling enhancements