Mobile category and group functionalities (#1737)

* More mobile functionalities

* Cleanup

* Remove close button on mobile budget summary modal

* Release notes

* Close mobile inputs on enter

* Fix mobile budget row header color

* Fix income group hidden

* Add validation + close button on category tooltip

* Add mobile budget visual cues

* More mobile visual cues

* Error message fix

* Update blank category name behavior

* Cleanup

* Cleanup

* Fix mobile group deletion and category tooltip behavior

* Zero sign for AmountInput

* VRT snapshot updates

* Handle null values in must-category-transfer