Persist search tabs and marks on restart

[lubokkanev]

I use klogg for tens of log files. And for each open file I have tens of search tabs with marks. Each search is a very important piece of the puzzle, which helps me find the cause of the issue.
Well, on restart almost all of that is lost. The opened files are persisted, but the searches and marks are not. I have to start over.
And a restart is needed from time to time. For example, when you want to install a system update.