Fixed various typos.

Applied patch by snowleopard2 fixing a bunch of typos such as misspellings and double words in the documentation. Combined the patch with some local queued typos waiting to be committed as well as adding new typo fixes inspired by the patch.

Function names with American spelling were not changed nor was third-party code touched. The only code changes involve some changes in strings that are translated ("Can not" -> "Cannot").

Closes #13063 (again).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67280 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/carbon/nonownedwnd.cpp

@@ -237,12 +237,12 @@ void wxNonOwnedWindowCarbonImpl::MacSetUnifiedAppearance( bool set )
         set ? kWindowNoAttributes : kWindowUnifiedTitleAndToolbarAttribute) ;
 
     // For some reason, Tiger uses white as the background color for this appearance,
-    // while most apps using it use the typical striped background. Restore that behavior
+    // while most apps using it use the typical striped background. Restore that behaviour
     // for wx.
     // TODO: Determine if we need this on Leopard as well. (should be harmless either way,
     // though)
     // since when creating the peering is not yet completely set-up we call both setters
-    // explicitely
+    // explicitly
     m_wxPeer->SetBackgroundColour( wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW) ) ;
     SetBackgroundColour( wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW) ) ;
 }