IRC colors: "Open (null)" when trying to open certain URLs

[reedy]

As requested on IRC, I'm reporting that it's possible to click on a link in iQuassel and get a menu item that says "Open (null)"

Currently on a plane, no data on my mobile, so can't check the iQuassel version. However, it's not a recent regression

Will come back later with an example IRC line too for a reproducible case

[guruz]

Adding this from IRC:

<Reedy> IIRC, it's a URL prefixed by IRC colour control characters and it gets messed up

[reedy]

So, an example IRC line is (seems github doesn't display it as raw text)

[11:24] <wikibugs> (�03PS2�) �10�C. Scott Ananian�: WIP: Make private a number of methods not invoked outside the Parser class [core] - �10https://gerrit.wikimedia.org/r/567250�

For reference, but maybe not relevant: iPhone 8, iOS 13.3. iQuassel 1.8.2