Fix mouse change bug

BUG: script does not take effect when script is run

---
Test Scenario: Two mouse are attached to the different masters and
then we execute the script
Expected Behavior: both mouses reattach to the Virtual core
Problem: filter in the for-loop gathered all masters not slaves

src/scripts/python/changemouse.py

@@ -32,7 +32,7 @@ if __name__ == "__main__":
     pointers = xup.get_pointers()
     # TODO filter functionality inside utilities
     core_master = list(filter(lambda x: "Virtual core" in x.name, pointers))[0]
-    for pointer in filter(lambda x: not x.slave, pointers):
+    for pointer in filter(lambda x: x.slave, pointers):
         if not "eGalax" in pointer.name:
             com.reattach(pointer.id, core_master.id)
         else:

src/scripts/python/xutil/pointer.py

@@ -37,6 +37,10 @@ class Pointer(XInput):
     def __init__(self, name, id, is_master: bool) -> None:
         super().__init__(name, id, is_master)
 
+    @property
+    def slave(self):
+        return not self.is_master
+
 
 def get_short_pointer(id) -> Pointer:
     """Generates Pointer object corresponding to id (short attrs) 
@@ -57,7 +61,7 @@ def get_short_pointer(id) -> Pointer:
         is_master = "master" in props
         return Pointer(
             name.strip(),
-            props.split(maxsplit=1),
+            props.split(maxsplit=1)[0],
             is_master)
     else:
         raise TypeError(f'id[{id}] is not a pointer id')