Add new command /changes

With that command one can see the modifications of the runtime
configuration vs. the saved configuration.

Signed-off-by: Steffen Jaeckel <s@jaeckel.eu>

src/command/cmd_funcs.c

@@ -8948,6 +8948,14 @@ cmd_omemo_qrcode(ProfWin* window, const char* const command, gchar** args)
 #endif
 }
 
+gboolean
+cmd_changes(ProfWin* window, const char* const command, gchar** args)
+{
+    cons_show("Show changes from saved configuration file.");
+    prefs_changes();
+    return TRUE;
+}
+
 gboolean
 cmd_save(ProfWin* window, const char* const command, gchar** args)
 {