fixed next active tab

src/app/panels/tab-proxy.js

@@ -20,6 +20,7 @@ export class TabProxy {
 
     fileManager.events.on('fileClosed', (name) => {
       this.removeTab(name)
+      this.switchPreviousTab()
     })
 
     fileManager.events.on('currentFileChanged', (file) => {
@@ -104,7 +105,6 @@ export class TabProxy {
       const handlers = Object.keys(this._handlers)
       let i = handlers.indexOf(active)
       if (i >= 0) {
-        i = handlers[i - 1] ? i - 1 : handlers.length - 1
         this.switchTab(handlers[i])
       }
     }