Rename "[Mm]ethod(s)" to "[Ff]unction(s)"

Only methods as programming functions are affected. Besides renaming
some actions like "Switch Between Function Declaration/Definition" this
mostly touches (api) code comments.

This is a follow-up patch to commit 872bfb7.

Change-Id: Icb65e8d73b59a022f8885b14df497169543a3b92
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/debugger/debuggersourcepathmappingwidget.cpp

@@ -431,7 +431,7 @@ DebuggerSourcePathMappingWidget::SourcePathMap
     //        We could query the QtVersion for this information directly, but then we
     //        will need to add a dependency on QtSupport to the debugger.
     //
-    //        The profile could also get a method to extract the required information from
+    //        The profile could also get a function to extract the required information from
     //        its information to avoid this dependency (as we do for the environment).
     const QString qtInstallPath = findQtInstallPath(qmake);
     SourcePathMap rc = in;