IDE error when disabling and re-enabling plugin

[AndreasHae]

Describe the bug: An IDE error occurs when disabling and re-enabling the plugin and then saving within a module file.

Steps to reproduce:

1. Open app.module.ts
2. Open Plugins window
3. Disable the plugin
4. Apply
5. Close Plugins window
6. Enable the plugin
7. Apply
8. Save file

Expected behavior: No IDE error occuring

Additional context: Stack trace:

java.lang.IllegalArgumentException: window with id="Nx " is already registered
	at com.intellij.openapi.wm.impl.ToolWindowManagerImpl.registerToolWindow$intellij_platform_ide_impl(ToolWindowManagerImpl.kt:1034)
	at com.intellij.openapi.wm.impl.ToolWindowManagerImpl.registerToolWindow(ToolWindowManagerImpl.kt:1019)
	at com.jetbrains.rdserver.toolWindow.BackendServerToolWindowManager.registerToolWindow(BackendServerToolWindowManager.kt:102)
	at com.intellij.openapi.wm.ToolWindowManager.registerToolWindow(ToolWindowManager.kt:96)
	at com.intellij.lang.javascript.buildTools.base.JsbtToolWindowManager.setAvailable(JsbtToolWindowManager.java:57)
	at com.github.iguissouma.nxconsole.buildTools.NxJsbtStartupActivity$Companion.setAvailable$lambda$1(NxJsbtStartupActivity.kt:28)
	at com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:209)
	at com.intellij.openapi.application.TransactionGuardImpl.access$100(TransactionGuardImpl.java:21)
	at com.intellij.openapi.application.TransactionGuardImpl$1.run(TransactionGuardImpl.java:191)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:838)
	at com.intellij.openapi.application.impl.ApplicationImpl$3.run(ApplicationImpl.java:454)
	at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:74)
	at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:114)
	at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:36)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:779)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:730)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:724)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:749)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:909)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:756)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$5(IdeEventQueue.java:437)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:787)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$6(IdeEventQueue.java:436)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:105)
	at com.intellij.ide.IdeEventQueue.performActivity(IdeEventQueue.java:615)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$7(IdeEventQueue.java:434)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:838)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:480)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)