[okular] [Bug 407547] Open new files in tabs does not work in windows

https://bugs.kde.org/show_bug.cgi?id=407547 Paralel changed: What|Removed |Added CC||paralel.nonrecurently@aleea

[okular] [Bug 427953] Unique instance and open in tabs ignored

https://bugs.kde.org/show_bug.cgi?id=427953 Paralel changed: What|Removed |Added CC||paralel.nonrecurently@aleea

[okular] [Bug 361424] Add option to put tabs sideways

https://bugs.kde.org/show_bug.cgi?id=361424 Paralel changed: What|Removed |Added CC||paralel.nonrecurently@aleea