Add swipe-click handler to media modal

Now swiping will correctly change the current media, and with a good
preview. Clicking without swiping closes the overlay.

src/components/pinch_zoom/pinch_zoom.js

@@ -2,5 +2,10 @@ import PinchZoom from '@kazvmoe-infra/pinch-zoom-element'
 
 export default {
   props: {
+  },
+  methods: {
+    setTransform ({ scale, x, y }) {
+      this.$el.setTransform({ scale, x, y })
+    }
   }
 }