wait for table after sort

Author: T4rk1n

components/dash-table/tests/selenium/conftest.py

@@ -341,6 +341,7 @@ def select(self, row=0):
     @preconditions(_validate_row)
     def sort(self, row=0):
         self.find_inside(row, ".column-header--sort").click()
+        self.mixin._wait_for_table(self.id)
 
     def filter(self):
         return (