Add removing of tasks (#48)

Add removing of tasks

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/48

src/styles/theme/theme.scss

@@ -27,3 +27,7 @@ h1,h2,h3,h4,h5,h6{
 .progress {
   border-radius: $radius-large;
 }
+
+.has-no-border{
+  border: none !important;
+}