Clear on init as well

Fixes the back button never being available.  Plus it makes it so you
have to wait for the next fetch which I think makes sense so you are not
trying to connect with potentially stale data.

Author: code-asher

src/main/kotlin/com/coder/gateway/views/steps/CoderWorkspacesStepView.kt

@@ -311,6 +311,7 @@ class CoderWorkspacesStepView(val enableNextButtonCallback: (Boolean) -> Unit) :
     }
 
     override fun onInit(wizardModel: CoderWorkspacesWizardModel) {
+        listTableModelOfWorkspaces.items = emptyList()
         enableNextButtonCallback(false)
         if (localWizardModel.coderURL.isNotBlank() && localWizardModel.token.isNotBlank()) {
             triggerWorkspacePolling(true)