wxGUI: Integrate Grapical Modeler into single window layout (#3003)

* log in main statusbar
* rename classes/methods map -> main
* new icon modeler-settings, add model properties into toolbar
* menu implemented for dockable widget
* unique menu shortcuts
* address issues reported by flake8

.flake8

@@ -69,7 +69,7 @@ per-file-ignores =
     gui/wxpython/gcp/g.gui.gcp.py: F841
     gui/wxpython/gcp/manager.py: E501, F841, E722
     gui/wxpython/gcp/mapdisplay.py: F841
-    gui/wxpython/gmodeler/*: F841, E722, W605, F405, F403, E402
+    gui/wxpython/gmodeler/*: E501
     gui/wxpython/gui_core/*: F841, E266, E722, W605
     gui/wxpython/gui_core/dialogs.py: E501, E722, F841, W605
     gui/wxpython/gui_core/forms.py: E501, E722, F841

gui/wxpython/.pylintrc

@@ -319,7 +319,7 @@ ignore-on-opaque-inference=yes
 # List of class names for which member attributes should not be checked (useful
 # for classes with dynamically set attributes). This supports the use of
 # qualified names.
-ignored-classes=optparse.Values,thread._local,_thread._local
+ignored-classes=optparse.Values,thread._local,_thread._local,main_window.page.MainPageBase
 
 # List of module names for which member attributes should not be checked
 # (useful for modules/projects where namespaces are manipulated during runtime