chore:source prepare the new 4.19 version and update database version to 1881

Author: vertigo17

source/src/main/webapp/DatabaseMaintenance.jsp

@@ -65,7 +65,7 @@
                 // this is used in order to execute only 1 instruction at a time as it make take a lot of time to process.
                 boolean SQLExecuted = false;
                 // SQL that has version equal to SQLLimit will not be executed automatically.
-                Integer SQLLimit = 1784; // 4.18 Version LEVEL.
+                Integer SQLLimit = 1882; // 4.19 Version LEVEL.
                 IFactoryMyversion factoryMyversion;
 
                 try {