Added user language setting (#3875)

* Added user language setting

* Added translation string for setting

* Fixed import order + typo

* improved checking if the user has a language saved in the db

* The current saved language is now set a default inside the dropdown

* fmt

* When a user signs in and doesn't have a language saved, the current browser language is saved

* updated gitea-sdk

* Merge branch 'master' of https://github.com/go-gitea/gitea into save-user-language

# Conflicts:
#	models/migrations/migrations.go
#	models/migrations/v62.go

* Made tests work again

* trigger CI

* trigger CI

* fmt

* re-trigger that FUCKING CI SO IT REALLY PICKS UP THE LATEST COMMIT ISTEAD OF PREDENDING TO DO SO

* re-trigger that FUCKING CI SO IT REALLY PICKS UP THE LATEST COMMIT ISTEAD OF PREDENDING TO DO SO

* When loggin in, only the language col gets updated instead of everything

models/migrations/migrations.go

@@ -178,6 +178,8 @@ var migrations = []Migration{
 	NewMigration("add size column for attachments", addSizeToAttachment),
 	// v62 -> v63
 	NewMigration("add last used passcode column for TOTP", addLastUsedPasscodeTOTP),
+	// v63 -> v64
+	NewMigration("add language column for user setting", addLanguageSetting),
 }
 
 // Migrate database to current version

models/migrations/v63.go

@@ -0,0 +1,23 @@
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package migrations
+
+import (
+	"fmt"
+
+	"github.com/go-xorm/xorm"
+)
+
+func addLanguageSetting(x *xorm.Engine) error {
+	type User struct {
+		Language string `xorm:"VARCHAR(5)"`
+	}
+
+	if err := x.Sync2(new(User)); err != nil {
+		return fmt.Errorf("Sync2: %v", err)
+	}
+
+	return nil
+}