wait for input false first

Author: T4rk1n

components/dash-core-components/tests/integration/input/test_number_input.py

@@ -238,6 +238,7 @@ def update_output(val):
 
 def test_inni010_valid_numbers(dash_dcc, ninput_app):
     dash_dcc.start_server(ninput_app)
+    elem = dash_dcc.wait_for_element("#input_false")
     for num, op in (
         ("1.0", lambda x: int(float(x))),  # limitation of js/json
         ("10e10", lambda x: int(float(x))),