Account creation improvements & some other fixes (#2636)

* Quick fix to mobile

* Enlarge tap targets in account creation

* Improve keyboard behaviors during account creation

* Improve autocompletion behaviors during account creation

* Use the logo in the Deactivated screen

src/view/com/auth/create/Step3.tsx

@@ -33,6 +33,9 @@ export function Step3({
           placeholder="e.g. alice"
           value={uiState.handle}
           editable
+          autoFocus
+          autoComplete="off"
+          autoCorrect={false}
           onChange={value => uiDispatch({type: 'set-handle', value})}
           // TODO: Add explicit text label
           accessibilityLabel={_(msg`User handle`)}