Elementbrowser doesn't show elements when klicking on 21-...
When you need to select an element in the elementbrowser which is under number 21 or above (if there are more than 20 elements placed in a page), nothing is shown.
e.g. I save my template-snippets in a sysfolder and load them into the main-template. Therefor I have to select them via element browser from the sysfolder. The first 20 Sets are shown. Klicking on 21-... the elementbrowser only shows the pagetree and nothing else.
(issue imported from #M3016)