Change the `helmfile list` header "INSTALLED" -> "ENABLED" (#1161)

Resolves #1076

pkg/app/app.go

@@ -214,7 +214,7 @@ func (a *App) PrintState(c StateConfigProvider) error {
 
 func (a *App) ListReleases(c StateConfigProvider) error {
 	table := uitable.New()
-	table.AddRow("NAME", "NAMESPACE", "INSTALLED", "LABELS")
+	table.AddRow("NAME", "NAMESPACE", "ENABLED", "LABELS")
 
 	err := a.VisitDesiredStatesWithReleasesFiltered(a.FileOrDir, func(st *state.HelmState) []error {
 		//var releases m

pkg/app/app_test.go

@@ -3823,11 +3823,11 @@ releases:
 		assert.NilError(t, err)
 	})
 
-	expected := `NAME      	NAMESPACE	INSTALLED	LABELS       
-myrelease1	         	false    	id:myrelease1
-myrelease2	         	true     	             
-myrelease3	         	true     	             
-myrelease4	         	true     	id:myrelease1
+	expected := `NAME      	NAMESPACE	ENABLED	LABELS       
+myrelease1	         	false  	id:myrelease1
+myrelease2	         	true   	             
+myrelease3	         	true   	             
+myrelease4	         	true   	id:myrelease1
 `
 	assert.Equal(t, expected, out)
 }