fix all tabs closing

apps/remix-ide/src/app/panels/tab-proxy.js

@@ -153,6 +153,10 @@ export class TabProxy extends Plugin {
           displayName,
           () => this.emit('switchApp', name),
           () => {
+            if(name === 'home' && this.loadedTabs.length === 1 && this.loadedTabs[0].id === "home") {
+              const files = Object.keys(this.editor.sessions)
+              files.forEach(filepath => this.editor.discard(filepath))
+            }
             this.emit('closeApp', name)
             this.call('manager', 'deactivatePlugin', name)
           },