Hiding columns in grid breaks headers in dependent selects

[Crack]

When I add a field with optionDataSource and its editor is a SelectItem with multiple columns then this editor's headers stop rendering when I change column list in that ListGrid.

To reproduce:

1. Go to https://www.smartclient.com/smartcli...pendentSelects or https://www.smartclient.com/smartcli...pendentSelects
2. In editorProperties of orderList.itemName field add:
   

   	pickListFields: [{name: "itemID"}, {name: "itemName"}],

   :
3. Apply changes
4. Click on Order New Item
5. Click on editor for Item field - shown editor has headers (Item ID and Item)
6. Cancel editing so that new row disappears
7. Right click on Item column and hide Category column
8. Click on Order New Item
9. Click on editor for Item field - shown editor has no headers - it should behave the same as in pt. 5.

SmartClient version:

• v11.1p_2018-05-20/AllModules Development Only
• v12.0p_2018-05-20/AllModules Development Only

[Isomorphic]

This has been fixed back to SC 11.1p and will be in the next builds for those releases (dated 2018-05-25 and beyond).