UI - Refactoring progress

(see previous log message)

Makefile

@@ -18,6 +18,7 @@ COMMON = \
 	 common.cc \
 	 c-filewatcher.cc \
 	 c-utilities.cc \
+	 c-undo.cc \
 	 \
 	 c-ops.cc \
 	 c-opast.cc \
@@ -25,14 +26,12 @@ COMMON = \
 	 c-opcomp.cc \
 	 c-opmgr.cc \
 	 \
+	 c-sync.cc \
+	 c-syncedit.cc \
+	 c-syncoverrides.cc \
+	 \
 	 camera.cc \
 	 \
-	 undo.cc \
-	 \
-	 sync.cc \
-	 syncedit.cc \
-	 syncoverrides.cc \
-	 \
 	 ui.cc \
 	 ui-actions.cc \
 	 ui-app.cc \