add changing db in schema pane

src/views/DbUpload.vue

@@ -15,12 +15,10 @@ export default {
       worker: this.$store.state.worker
     }
   },
-  created () {
-    // Open a database
-    this.$store.state.worker.postMessage({ action: 'open' })
-  },
   methods: {
     loadDb () {
+      const dbName = this.$refs.dbfile.value.substr(this.$refs.dbfile.value.lastIndexOf('\\') + 1)
+      this.$store.commit('saveDbName', dbName)
       const f = this.$refs.dbfile.files[0]
       const r = new FileReader()
       r.onload = () => {
@@ -31,7 +29,6 @@ export default {
             WHERE type='table' AND name NOT LIKE 'sqlite_%';`
           this.worker.onmessage = event => {
             this.$store.commit('saveSchema', event.data.results[0].values)
-            // this.schema = event.data.results[0].values
             this.$router.push('/editor')
           }
           this.worker.postMessage({ action: 'exec', sql: getSchemaSql })