LLDropTarget should accept link targets instead of links

Also stylization changes
Write <archetype><meta> for assets in "My Inventory" folder too.
Back out of droptarget support for links.

Drag and drop support for links would have to be done in lltooldraganddrop, and would probably require a rework there.
War on std::string::find compares against -1 instead of std::string::npos
Stylistic changes and whatnot for LLDropTarget what with setValue and setItem
Have Drop Targets with settings update when their settings update.
Move LLDropTarget rectangle setting into a common function setChildRects
Feature Request: Add a clear button to drop targets (except where not needed).
Attempt to fix blank region name in region restarting floater.
Fix Issue 1690: Problem in the Italian translation
Useful fixies from upstream
Feature Request: If only one prim in a linkset is selected, show its individual land impact, like we used to.
Solve Issue 1696: buttons overlap
Merge branch 'master' of git://github.com/AlericInglewood/SingularityViewer
Hide the drop target reset button when its in the default state
Take SinguMotionResetsCamera into in handle_go_to.
Tiny tweak to handle_go_to that Ubit says will help on opensim

Doesn't seem to change anything on SecondLife.