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/macros/imacrohandler.cpp

@@ -60,8 +60,8 @@ using namespace Macros::Internal;
 
     When replaying a macro, the manager iterates through all macro events
     specified in \a macroEvent
-    in the macro and calls this method to determine which handler to use.
-    If the method returns \c true, \c executeEvent is called.
+    in the macro and calls this function to determine which handler to use.
+    If the function returns \c true, \c executeEvent is called.
 */
 
 /*!

src/plugins/macros/macromanager.cpp

@@ -77,13 +77,13 @@ using namespace Macros::Internal;
     The MacroManager manages all macros, loads them on startup, keeps track of the
     current macro, and creates new macros.
 
-    There are two important methods in this class that can be used outside the Macros plugin:
+    There are two important functions in this class that can be used outside the Macros plugin:
     \list
     \li registerEventHandler: add a new event handler
     \li registerAction: add a macro event when this action is triggered
     \endlist
 
-    This class is a singleton and can be accessed using the instance method.
+    This class is a singleton and can be accessed using the instance function.
 */
 
 /*!