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/sizer.cpp

@@ -2093,7 +2093,7 @@ void wxBoxSizer::RecalcSizes()
 
     // Check for the degenerated case when we don't have enough space for even
     // the min sizes of all the items: in this case we really can't do much
-    // more than to to allocate the min size to as many of fixed size items as
+    // more than to allocate the min size to as many of fixed size items as
     // possible (on the assumption that variable size items such as text zones
     // or list boxes may use scrollbars to show their content even if their
     // size is less than min size but that fixed size items such as buttons