fix (v-edit-dialog): restores **save** event

fixes #3197

src/components/VDataTable/VEditDialog.js

@@ -10,8 +10,7 @@ export default {
 
   data () {
     return {
-      isActive: false,
-      isSaving: false
+      isActive: false
     }
   },
 
@@ -60,7 +59,10 @@ export default {
         'class': 'small-dialog__actions'
       }, [
         this.genButton(this.cancel, this.cancelText),
-        this.genButton(() => this.save(this.returnValue), this.saveText)
+        this.genButton(() => {
+          this.save(this.returnValue)
+          this.$emit('save')
+        }, this.saveText)
       ])
     },
     genContent () {
@@ -69,7 +71,10 @@ export default {
           keydown: e => {
             const input = this.$refs.content.querySelector('input')
             e.keyCode === 27 && this.cancel()
-            e.keyCode === 13 && input && this.save(input.value)
+            if (e.keyCode === 13 && input) {
+              this.save(input.value)
+              this.$emit('save')
+            }
           }
         },
         ref: 'content'