Fix parent/child property extension for switch mode commands

normal-x2-mode.to.normal-x5-mode=+= -=
normal-x2-mode=normal-mode
normal-mode's .to. would override normal-x2-mode.to.normal-x5-mode

Complete example:
normal-mode.to.normal-x2-mode=+= -=
normal-x2-mode.to.normal-mode=+minus -minus
normal-x2-mode=normal-mode
normal-x2-mode.zoom.percent=2.0
normal-x2-mode.zoom.center=mouse

normal-x2-mode.to.normal-x5-mode=+= -=
normal-x5-mode.to.normal-x2-mode=+minus -minus
normal-x5-mode=normal-mode
normal-x5-mode.zoom.percent=5.0
normal-x5-mode.zoom.center=mouse

Author: petoncle

src/main/java/mousemaster/ConfigurationParser.java

@@ -2313,7 +2313,6 @@ void extend(Object parent_) {
                     if (!builder.containsKey(parentEntry.getKey()))
                         builder.put(parentEntry.getKey(), parentEntry.getValue());
                 }
-                builder.putAll(parent);
             }
         }