Environment

Vuetify Version: 2.2.20
Vue Version: 2.6.11
Browsers: Chrome 80.0.3987.163
OS: Mac OS 10.15.2

Steps to reproduce

1. open console
2. focus input
3. check console for 'handleFocus'
4. click 'no data'
5. check console for 'handleBlur'
6. re-focus input field
7. handleFocus doesn't trigger again

Expected Behavior

v-autocomplete/v-combobox `@b

Is your feature request related to a problem? Please describe.
Some variables don't override if you import before like $grid-breakpoints and $display-breakpoints

I think is because the instance of $display-breakpoints and $grid-breakpoints was created before the override variables ..

For this reason, when you override $grid-breakpoints, the variables $display-breakpoints still was the v