Add ability to cancel rotation from viewport rotation gizmo

editor/plugins/node_3d_editor_plugin.h

@@ -85,6 +85,7 @@ class ViewportRotationControl : public Control {
 	Vector2i orbiting_mouse_start;
 	int orbiting_index = -1;
 	int focused_axis = -2;
+	bool gizmo_activated = false;
 
 	const float AXIS_CIRCLE_RADIUS = 8.0f * EDSCALE;
 
@@ -413,6 +414,7 @@ private:
 	// so one cursor is the real cursor, while the other can be an interpolated version.
 	Cursor cursor; // Immediate cursor
 	Cursor camera_cursor; // That one may be interpolated (don't modify this one except for smoothing purposes)
+	Cursor previous_cursor; // Storing previous cursor state for canceling purposes
 
 	void scale_fov(real_t p_fov_offset);
 	void reset_fov();