In Plasma 4, the textedit box of the krunner had this nice auto-completion feature that you could just enter the first letters and it would suggest the auto-completion.

Eg. if you had opened a URL through krunner in the past, let's say open-tools.net/forum/recent.html, then when you started typing open, it would automatically fill the rest and suggest that whole URL (or app) from the history. 
This meant that one could simply type open[Return] and that URL would be opened. 

In Plasma5, the text edit no longer auto-completes, it merely suggests the default apps/bookmarks/etc. So when you type "auto[Return]" it first does NOTHING, but if you wait a bit before the [Return], krunner will start the first suggestion "open on the command line".
Both cases are not what is desired in my case...

You also don't have any visual feedback in the textinput box.

So, please bring back the auto-complete from the history as it was in Plasma 4.

This issue is somehow connected to issue #335731 (missing history), but the auto-completion I'm complaining about is not neccessarily only about the history. And in any case, issue #335731 is only about history being available with the up/down keys, but not about auto-completion.

Reproducible: Always