chore: Button cruft cleanup (#11342)

* toggleSchedule

* cleaning up run query button

* removing unnecessary (subtle!) style overrides

* bulk action classname to button style prop

* nixing btn-primary

* nixing cancelQuery class

* togglesave

* nixing autocomplete class

* linting

* nixing button classes of 'ok' and 'reset'

* unoing diagnostic test

* begrudgingly adding an m-r-3 class... for now

* this is not a class to worry about

* test fixes for limit control

* updating TODO notes, calling it a day for now.

* gah... copy paste error.

superset-frontend/src/SqlLab/components/SqlEditor.jsx

@@ -558,7 +558,7 @@ class SqlEditor extends React.PureComponent {
         </div>
         <div className="rightItems">
           <Button
-            className="autocomplete"
+            data-test="autocomplete"
             buttonSize="small"
             onClick={this.handleToggleAutocompleteEnabled}
           >