[Solved] Active cell border missing

[tif]

My 5y old daughter was messing with my Calc sheet and I've been totally frustrated with this. She somehow deactivated a "frame" around the active cell (dark, black border around it), when mouse cliked. I think, it should be something wrong with Graphics output. I've already activeted "OpenGL for rendering" but it is not working good (rendering is terrible). How can I active it again, it is very hard work without it. I've attached screen shots of both.

OS ubuntu 16.10, Calc version 5.2.2.2

[soby]

You need to uncheck "use OpenGL for all rendering and ignore OpenGL blacklist"
these both are disabled by default on Linux

[soby]

And i forgot to say to delete your user profile
hope this helps