No code changes, fixed various typos.

Applied patch by snowleopard2 fixing typos in interface/. Extended the fixes throughout trunk.

Closes #13076.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67384 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dialup.h

@@ -171,7 +171,7 @@ public:
     bool IsConnectedEvent() const
         { return GetEventType() == wxEVT_DIALUP_CONNECTED; }
 
-    // does this event come from wxDialUpManager::Dial() or from some extrenal
+    // does this event come from wxDialUpManager::Dial() or from some external
     // process (i.e. does it result from our own attempt to establish the
     // connection)?
     bool IsOwnEvent() const { return m_id != 0; }