Fix issue #48 analog to dadler's fix for thumbnail-zoom

[hsiktas]

dadler's commit: https://github.com/dadler/thumbnail-zoom/commit/683869e1e8c0698fff4010a43d9ccf45d4e70ada

An unindented switch might still happen, while the fullscreen-animation is still ongoing and but after that Tab Scope will not cause a switch away from the current space / virtual desktop.