Add "title" and "help_id" parameters and members/properties to
GimpToolDialog, GimpToolGui, GimpOperationTool. Also make the order of
parameters more consistent.
There is now a preference option that determines whether windows
should be opened on the same monitor as before. It should be disabled
when the machine gets monitors plugged/unplugged dynamically ("laptop")
and enabled when there is a static multi-monitor setup ("wokstation").
This is merely the current simplistic policy on top of the newly added
underlying infrastructure:
- pass integer monitor numbers around in all places where we already
pass around a GdkScreen. Pass the "current" monitor to these changed
APIs, where "current" is either the monitor where the action-triggering
widget is, or if that is unavailable the monitor where the mouse is.
- add gimp_widget_get_monitor() in order to easily get to the monitor,
just like gtk_widget_get_screen().
- add screen and monitor parameters in some places that were missed
before.
- in sessionrc, save all window positions relative to the window's
monitor, and save the monitor separately, if it's not the screen's
primary monitor.
- when restoring window positions, use the stored monitor when the new
prefs options says so (use the screen's primary monitor if there is
no stored monitor), otherwise use current monitor that is now passed
around.
Change the "GtkWidget *parent" parameter of GimpToolDialog to
"GimpDisplayShell". Also add API gimp_tool_dialog_set_shell() so an
existing dialog can be used on different images. Make sure the dialog
closes when the shell is unmapped (like when switching tabs in SWM),
and make the dialog transient for the toplevel GimpImageWindow.
Change all tool dialog users accordingly.
