[Bug 1782132] [NEW] Menus do not open when clicked

[Peter Barker]

Public bug reported:

This appears similar to question in https://askubuntu.com/questions/1054184/crippled-menus-in-konqueror-rekonq-and-digikam
Some other apps are also affected, including the menu bar in okular. 
Many drop-down menus in web pages displayed in Opera also do not drop - items can be displayed using the down arrow key to scroll these (but not menus on menu bars)
When click on a menu bar item it goes dark grey, but the menu does not drop down.
I first noticed this after a recent upgrade. System is set to do automatic upgrades, but I often do them manually also.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: digikam 4:4.12.0-0ubuntu7
ProcVersionSignature: Ubuntu 4.4.0-130.156-generic 4.4.134
Uname: Linux 4.4.0-130-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CurrentDesktop: KDE
Date: Tue Jul 17 21:52:05 2018
InstallationDate: Installed on 2015-09-12 (1038 days ago)
InstallationMedia: Kubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
SourcePackage: digikam
UpgradeStatus: Upgraded to xenial on 2016-07-31 (716 days ago)

** Affects: digikam (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: okular (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

** Also affects: okular (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1782132

Title:
  Menus do not open when clicked

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