Improve appearance of colorpicker dialog

- Set a proper title instead of using a legend element

- Fix horizontal scrolling

- Prevent resizing and dragging

- Text changes
Fix wrong selection being restored in IE

For some reason, the events that cause a selection to be saved occur after
clicking on a toolbar item (such as increase/decrease font size).  This causes
the wrong selection to be restore, often causing the whole page being selected
rather than a portion of selected text.
Cleanup whitespace
Better IE selection fix, not involving setTimeout
Centre Farbtastic v1 color wheel better