Kf5 based apps do not reliably storeSession and performLegacySessionSave

Kf5 based applications do not reliably start up again on new sessions after logging out and in again. This was noted specifically on konversation as discussed in this bug here (Konversation session doesn't resume):
https://bugs.kde.org/show_bug.cgi?id=363876

but other applications are also affected with the master bug report here (missing some clients or windows when storeSession and performLegacySessionSave):
https://bugs.kde.org/show_bug.cgi?id=354724

Unfortunately this is a version related problem that is fixed with newer versions and would require either a backport or upgrade on (k)ubuntu 16.04 as mentioned in the aforementioned bug report.

1. This is on (K)Ubuntu 16.04
2. konversation version 1.6-0ubuntu1
3. konversation should always restart on starting a new session
4. konversation does not reliably restart on on a new session

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: konversation 1.6-0ubuntu1
Uname: Linux 4.7.5-ck5 x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: KDE
Date: Thu Sep 29 09:49:13 2016
ProcEnviron:
 LANGUAGE=en_GB:en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: konversation
UpgradeStatus: No upgrade log present (probably fresh install)