feat: add keyboard shortcut to toggle task description edit (#2332)

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/2332
Reviewed-by: Dominik Pschenitschni <dpschen@noreply.kolaente.de>

src/directives/shortcut.ts

@@ -4,6 +4,9 @@ import {isAppleDevice} from '@/helpers/isAppleDevice'
 
 const directive: Directive = {
 	mounted(el, {value}) {
+		if(value === '') {
+			return
+		}
 		if (isAppleDevice() && value.includes('Control')) {
 			value = value.replace('Control', 'Meta')
 		}