* panel-plugin/screenshooter-plugin.c:

	  - remove the wrong XFCE_PANEL_PLUGIN_REGISTER_INTERNAL macro call,
	    the plugin is external.
	  - add (set_panel_button_tooltip) to simplify the code, this function
	    sets the tooltip according to the area to be captured.
	  - use g_spawn_command_line_async to laucnh the help window.
	  - improve the indentation in some places.
	* lib/screenshooter-utils.c:
	  - improve the indentation in some places.
	  - (screenshooter_open_screenshot):
	    + declare the variables at the beginning of the code block.
            + use g_spawn_command_line_async to launch the applications.
	* lib/screenshooter-dialogs.c: improve the indentation.


(Old svn revision: 7216)