LibGUI/WindowServer: Rename mouse capture -> mouse relative

My terminology was incorrect and this is more correct

userspace/libraries/LibGUI/include/LibGUI/Packet.h

@@ -205,7 +205,7 @@ namespace LibGUI
 		WindowInvalidate,
 		WindowSetPosition,
 		WindowSetAttributes,
-		WindowSetMouseCapture,
+		WindowSetMouseRelative,
 		WindowSetSize,
 		WindowSetMinSize,
 		WindowSetMaxSize,
@@ -266,8 +266,8 @@ namespace LibGUI
 		);
 
 		DEFINE_PACKET(
-			WindowSetMouseCapture,
-			bool, captured
+			WindowSetMouseRelative,
+			bool, enabled
 		);
 
 		DEFINE_PACKET(

userspace/libraries/LibGUI/include/LibGUI/Window.h

@@ -43,7 +43,7 @@ namespace LibGUI
 		void invalidate(int32_t x, int32_t y, uint32_t width, uint32_t height);
 		void invalidate() { return invalidate(0, 0, width(), height()); }
 
-		void set_mouse_capture(bool captured);
+		void set_mouse_relative(bool enabled);
 		void set_fullscreen(bool fullscreen);
 		void set_title(BAN::StringView title);