Move "Search" tool above map +/- buttons

* New toolbarType "maptop"
* After map loads, if there are any "maptop" plugins, lower the +/- buttons and other tools to make room for them
* Adjust CSS for toolbar buttons so they don't have to be inside of ".tools"
* Move default plugin panel location so it doesn't overlap search bar (and simplify positioning code)
Activate search tool by default

* Remove auto-expand feature (and related focus event-handling)
* Move results box so it doesn't overlap other tools
* Misc simplifications of CSS and JS

Also overlay "tool" div on launcher
* Hovering over tool now shows pointer cursor
* Move tooltip from launcher to tool so tooltip doesn't keep popping up when you're entering text