Feature: preview application by ID by admin

- added ApplicationPreview page for admin;
- added a new table to admin dashboard with applications in draft;

src/assets/scss/components/layout.scss

@@ -134,6 +134,17 @@ img {
   }
 }
 
+.blockingOverlay {
+  position: absolute;
+  z-index: 999;
+  inset: 0;
+  background-color: rgba(255,255,255,0.3)
+}
+
+button[disabled] {
+  filter: grayscale(1);
+}
+
 @media (max-width: 800px) {
   .inner {
     flex-direction: column;