PLT-2992 Added the ability to use different themes for each team (#3411)

* Cleaned up user_settings_theme.jsx and import_theme_modal.jsx

* Made ImportThemeModal use a callback to return the theme to the user settings modal instead of saving it directly

* Moved user theme from model to preferences

* Added serverside API to delete preferences TODO update package with client stuff

* Changed constants.jsx so that Preferences and ActionTypes can be imported on their own

* Updated ThemeProps migration code to properly rename solarized code themes

* Fixed warnings thrown by AppDispatcher

* Added clientside UI to support team-specific themes

* Removed debugging code from test

* Fixed setting a user's theme when they haven't set their theme before

api/preference_test.go

@@ -161,3 +161,49 @@ func TestGetPreference(t *testing.T) {
 		t.Fatal("preference updated incorrectly")
 	}
 }
+
+func TestDeletePreferences(t *testing.T) {
+	th := Setup().InitBasic()
+	Client := th.BasicClient
+	user1 := th.BasicUser
+
+	var originalCount int
+	if result, err := Client.GetAllPreferences(); err != nil {
+		t.Fatal(err)
+	} else {
+		originalCount = len(result.Data.(model.Preferences))
+	}
+
+	// save 10 preferences
+	var preferences model.Preferences
+	for i := 0; i < 10; i++ {
+		preference := model.Preference{
+			UserId:   user1.Id,
+			Category: model.PREFERENCE_CATEGORY_DIRECT_CHANNEL_SHOW,
+			Name:     model.NewId(),
+		}
+		preferences = append(preferences, preference)
+	}
+
+	if _, err := Client.SetPreferences(&preferences); err != nil {
+		t.Fatal(err)
+	}
+
+	// delete 10 preferences
+	th.LoginBasic2()
+
+	if _, err := Client.DeletePreferences(&preferences); err == nil {
+		t.Fatal("shouldn't have been able to delete another user's preferences")
+	}
+
+	th.LoginBasic()
+	if _, err := Client.DeletePreferences(&preferences); err != nil {
+		t.Fatal(err)
+	}
+
+	if result, err := Client.GetAllPreferences(); err != nil {
+		t.Fatal(err)
+	} else if data := result.Data.(model.Preferences); len(data) != originalCount {
+		t.Fatal("should've deleted preferences")
+	}
+}