(ScriptEditor) Make the language combobox non-resizeable
(ScriptingPanel) Make sure the run button is re-enabled when selecting a valid language
(PanelOptions) Remove useless import
(ScriptingEditor) Display the absolute path of the selected tab in the titlebar
(ScriptingEditor) Do not override JTabbedPane, use the listener intead

This consolidates code that was split in two places
Rename PanelOptions to CommandPanel, and ButtonTabComponent to TabComponentButton