chore: disable another flaky cypress test (#8423)

Also fix isort issue on master

Author: mistercrunch

superset/assets/cypress/integration/dashboard/controls.js

@@ -52,7 +52,7 @@ export default () => describe('top-level controls', () => {
     forceRefreshRequests.length = 0;
   });
 
-  it('should allow chart level refresh', () => {
+  it.skip('should allow chart level refresh', () => {
     cy.wait(sliceRequests);
     cy.get('.grid-container .world_map').should('be.exist');
     cy.get(`#slice_${mapId}-controls`).click();

superset/db_engine_specs/bigquery.py

@@ -24,7 +24,6 @@
 
 from superset.db_engine_specs.base import BaseEngineSpec
 
-
 pandas_dtype_map = {
     "STRING": "object",
     "BOOLEAN": "bool",