save prefs on changeFile

Author: monteslu

package.json

@@ -21,7 +21,7 @@
     "react-mfb-iceddev": "^0.1.0",
     "react-style": "^0.4.0",
     "skrim": "0.0.3",
-    "snacks": "^0.3.0",
+    "snacks": "^0.3.1",
     "sovereign": "^0.3.0",
     "when": "^3.7.2"
   },

src/plugins/handlers.js

@@ -192,6 +192,7 @@ function handlers(app, opts, done){
     const doc = documents.swap(path.join(cwd, filename));
     if(doc){
       workspace.changeFile(filename)
+        .then(() => userConfig.set('last-file', filename))
         .then(() => workspace.updateContent(doc.getValue()))
         .then(function(){
           documents.focus();