node_mananger_fkie: added a question dialog to start the synchronization with a loaded config, if any exists
node_manager_fkie: added a button to hide the dock widgets
node_manager_fkie: Install data files without executable bit
node_manager_fkie: Parse package.xml for name

Although package folders should have the same name as the
package, some packages (e.g. swig-wx) violate this.
Thus, we use catkin_pkg.package.parse_package to parse
the package.xml and look for the <name> tag, which
contains the correct package name.