MacOSX: revert part of changes of commit "Fixed macFUSE support for macOS 11 (Big Sur)"

We only changes related to the fix

.gitignore

@@ -11,9 +11,6 @@
 *.txt.h
 *.h.gch
 src/Main/veracrypt
-*.oo
-*.o.32
-*.o.64
 
 # wxWidgets Linux build artifacts
 src/wxrelease

src/Main/Forms/MainFrame.h

@@ -170,7 +170,7 @@ namespace VeraCrypt
 
         void EnsureVisible(bool bOnlyHeadingBar = false)
         {
-		wxDisplay display;
+        	wxDisplay display (this);
         	wxRect displayRect = display.GetClientArea();
         	    
         	bool bMove = false;