Is your feature request related to a problem? Please describe.
When working with a big piece of text, I sometimes scroll down and copy some text into another tab. When switching back to the first tab, both the input and the output pane is back on top. So I don't know where I was working just now.

Describe the solution you'd like
After tab switching, scroll position should be remembere

I made a new release 1.1.15b1 for testing, see there:

https://github.com/borgbackup/borg/releases/tag/1.1.15b1

As you see, the borg code is pretty much the same as in 1.1.14, but especially the binary building got some updates. Thus, primarily the binaries should get some testing, to find issues before I make the final 1.1.15 release later this year.

As they were made on debian stretch wi

I've been treating tuShorten/tuWiden as a string-ish conversion between UTF16 and UTF 8, so I recommend this.

Here's the code; add it to the end of every tuShorten/tuWiden function.
if (out < (original_out + out_len)) out = 0;