Implemented ModeSizer with ModeButtons for the mode view changing from the settings tabs and plater

src/slic3r/GUI/Tab.hpp

@@ -31,6 +31,7 @@
 #include "BedShapeDialog.hpp"
 #include "Event.hpp"
 
+class PrusaModeSizer;
 
 namespace Slic3r {
 namespace GUI {
@@ -123,6 +124,8 @@ protected:
 	wxTreeCtrl*			m_treectrl;
 	wxImageList*		m_icons;
 
+    PrusaModeSizer*     m_mode_sizer;
+
    	struct PresetDependencies {
 		Preset::Type type	  = Preset::TYPE_INVALID;
 		wxCheckBox 	*checkbox = nullptr;