fix(preferences): Fix the issue when signature is too long and preferences are not saved. Note that MySQL profile table should be updated with a migration script

UI/MainUI/SOGoProfile-mysql.sql

@@ -0,0 +1,11 @@
+--
+-- (C) 2004-2005 SKYRIX Software AG
+-- (C) 2006-2007 Inverse inc.
+-- (C) 2023 Alinto
+--
+
+CREATE TABLE @{tableName} (
+  c_uid      VARCHAR(255) NOT NULL PRIMARY KEY,
+  c_defaults MEDIUMTEXT,
+  c_settings TEXT
+);