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

model/user.go

@@ -49,7 +49,6 @@ type User struct {
 	AllowMarketing     bool      `json:"allow_marketing,omitempty"`
 	Props              StringMap `json:"props,omitempty"`
 	NotifyProps        StringMap `json:"notify_props,omitempty"`
-	ThemeProps         StringMap `json:"theme_props,omitempty"`
 	LastPasswordUpdate int64     `json:"last_password_update,omitempty"`
 	LastPictureUpdate  int64     `json:"last_picture_update,omitempty"`
 	FailedAttempts     int       `json:"failed_attempts,omitempty"`
@@ -106,10 +105,6 @@ func (u *User) IsValid() *AppError {
 		return NewLocAppError("User.IsValid", "model.user.is_valid.auth_data_pwd.app_error", nil, "user_id="+u.Id)
 	}
 
-	if len(u.ThemeProps) > 2000 {
-		return NewLocAppError("User.IsValid", "model.user.is_valid.theme.app_error", nil, "user_id="+u.Id)
-	}
-
 	return nil
 }
 
@@ -179,21 +174,6 @@ func (u *User) PreUpdate() {
 		}
 		u.NotifyProps["mention_keys"] = strings.Join(goodKeys, ",")
 	}
-
-	if u.ThemeProps != nil {
-		colorPattern := regexp.MustCompile(`^#[0-9a-fA-F]{3}([0-9a-fA-F]{3})?$`)
-
-		// blank out any invalid theme values
-		for name, value := range u.ThemeProps {
-			if name == "image" || name == "type" || name == "codeTheme" {
-				continue
-			}
-
-			if !colorPattern.MatchString(value) {
-				u.ThemeProps[name] = "#ffffff"
-			}
-		}
-	}
 }
 
 func (u *User) SetDefaultNotifications() {
@@ -282,7 +262,6 @@ func (u *User) ClearNonProfileFields() {
 	u.AllowMarketing = false
 	u.Props = StringMap{}
 	u.NotifyProps = StringMap{}
-	u.ThemeProps = StringMap{}
 	u.LastPasswordUpdate = 0
 	u.LastPictureUpdate = 0
 	u.FailedAttempts = 0