fix result toolbar button focus handling

Author: pfitzseb

lib/editor/result-view.js

@@ -155,7 +155,19 @@ export default class ResultView {
       for (let b of buttons(this.model)) {
         let v = document.createElement('button')
         v.classList.add('btn', b.icon)
-        v.addEventListener('click', b.onclick)
+        v.addEventListener('mouseup', ev => {
+          b.onclick()
+          this.focusPrevious()
+        })
+
+        v.addEventListener('mousedown', ev => {
+          this.blurEditor()
+          this.previousFocus = document.activeElement
+        })
+
+        v.addEventListener('mouseleave', ev => {
+          this.focusPrevious()
+        })
         tb.appendChild(v)
       }
     }