wxGUI: Integrate Grapical Modeler into single window layout

[landam]

Screencast from 2023-11-08 12-05-31.webm

Implemeneted:

• graphical modeler opens in main notebook when single layout enabled
• dock/undock icon added into toolbar
• title set correctly on model changed
• modeler settings replaced by new icon to avoid confusion with GUI settings icon
• new icon added into toolbar to allow setting model properties (this functionality was available only from the menu)

Not implemented (will be solved in subsequent PRs):

• menu not shown (could be integrated in the main menu as a new "Modeler" item)

Related changes in API:

• gmodeler code refactored (new modules canvas and panels)
• display/map like classes/methods/variables renamed (eg. MapNotebook renamed to MainNotebook, ...)