per default, only use the path segment of the codebaseURL
in the locationInput edit.
further simplification of SystemBrowser UI:
- removed opacity for windows
- created rightClickMenu for LocationInput-Edit to avoid the need for the buttons 'Codebase' and 'Local'
- removed additional line for LocationInput-Edit, now only above left pane
- changed default height for browsers: since space for command buttons and LocationInput has been removed, less height is now required to make it look good