Move all create views to better looking popups (#383)

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/383
Co-authored-by: konrad <konrad@kola-entertainments.de>
Co-committed-by: konrad <konrad@kola-entertainments.de>

cypress/integration/list/namespaces.spec.js

@@ -26,12 +26,12 @@ describe('Namepaces', () => {
 			.click()
 		cy.url()
 			.should('contain', '/namespaces/new')
-		cy.get('h3')
+		cy.get('.card-header-title')
 			.should('contain', 'Create a new namespace')
 		cy.get('input.input')
 			.type('New Namespace')
 		cy.get('.button')
-			.contains('Add')
+			.contains('Create')
 			.click()
 		cy.url()
 			.should('contain', '/namespaces')