[BUG] Disappearing text selection

[nvllz]

When we select a block of text and bookmark it from the pop-up dialog, the text remains selected. However, when an external app is selected (such as a translator or dictionary), the text selection is dismissed. This happens with both EPUB and PDF files.

It would be useful to keep the selection so that I don't lose my place every time I look up a word or translate a short phrase in an external app and then come back to Librera.