How to refresh reference to objects in Visual Studio SSDT?
Ok, I've find out the answer for my question. One man had similar case and put it on MSDN. And Microsoft answer was that Visual Studio will not implement Visual Studio SSDT InteliSense reference refreshment feature. The workaround they've proposed is to remove and recreate the "database reference" in particular SSDT project. So I've removed old database reference and next create it back again. After such modification InteliSense drop-down list for references for TSQL code has been refreshed and works well. So when you add new objects to the referenced database you have to remove and create again database reference to be able to see newly created objects in InteliSense drop-down list when coding.