Update: Various improvements to vue forms,tables
- Added UploadField.vue form component for file uploads
- Enable configuring form templates for multipart/form-data
- Upgraded phpoffice/phpspreadsheet to v1.29.9
- Various vue table improvements:
- Added DatepickerFilter.vue component for single-date filtering
- Enabled scrollable table, fixed/selectable columns, auto-download
- Table filters now inherit from HeadlessFormField.vue component