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/common/combocmn.cpp

@@ -160,7 +160,7 @@ wxCONSTRUCTOR_5( wxComboBox, wxWindow*, Parent, wxWindowID, Id, \
 #endif
 
 // NB: Let's not be afraid to use wxGTK's wxPopupTransientWindow as a
-//     'perfect' popup, as it can succesfully host child controls even in
+//     'perfect' popup, as it can successfully host child controls even in
 //     popups that are shown in modal dialogs.
 
 #define USE_TRANSIENT_POPUP           1 // Use wxPopupWindowTransient (preferred, if it works properly on platform)
@@ -2645,7 +2645,7 @@ void wxComboCtrlBase::OnSetValue(const wxString& value)
         bool found = true;
         wxString trueValue = value;
 
-        // Conform to wxComboBox behavior: read-only control can only accept
+        // Conform to wxComboBox behaviour: read-only control can only accept
         // valid list items and empty string
         if ( m_popupInterface && HasFlag(wxCB_READONLY) && value.length() )
         {