Fix crashing on droping text (#302)

* Add basic drop overlay

* Prevent crash when dragging text

* Only show popup when files are being dragged

* Make drop box bigger

* Make drag drop overlay without a modal

* Don't show drag drop menu on top of modals

* Use different way to check for modal

src/index.scss

@@ -101,6 +101,7 @@
 
   /* shadow and overlay */
   --bg-overlay: rgba(0, 0, 0, 20%);
+  --bg-overlay-low: rgba(0, 0, 0, 85%);
 
   --bs-popup: 0 0 16px rgba(0, 0, 0, 10%);