add DangerousActionButton, add option to delete files thru StorageModal

dist/styles.css

@@ -457,11 +457,14 @@ textarea {
   display: inline-flex;
 }
 
-.modal,
-[hidden] {
+.modal{
   display: none;
 }
 
+[hidden] {
+  display: none !important;
+}
+
 main,
 .tile,
 .tile > div {