rename class Center to LxTools

lxtools_installer.py

@@ -14,7 +14,7 @@ from manager import (
     System,
     Image,
     AppManager,
-    Center,
+    LxTools,
 )
 from network import NetworkChecker
 from message import MessageDialog
@@ -620,7 +620,7 @@ class LXToolsGUI:
         self.root.geometry(
             f"{LXToolsAppConfig.WINDOW_WIDTH}x{LXToolsAppConfig.WINDOW_HEIGHT}+100+100"
         )
-        Center.center_window_cross_platform(
+        LxTools.center_window_cross_platform(
             self.root, LXToolsAppConfig.WINDOW_WIDTH, LXToolsAppConfig.WINDOW_HEIGHT
         )
         self.root.configure(bg=self.colors["bg"])