title: Dynamic scrolling in combobox ext 4.0
body: <p>I am using extjs 4.0 and having a combobox with queryMode 'remote'. I fill it with data from server. The problem is that the number of records from server is too large, so I thought it would be better to load them by parts. I know there is a standart paginator tool for combobox, but it is not convinient because needs total number of records. 
  The question, is there any way to add dynamic scrolling for combobox? When scrolling to the bottom of the list I want to send request for the next part of records and add them to the list. I can not find appropriate listener to do this.</p>
  
  <p>UPDATED
  Found out solution, it is posted in the answers</p>