[KevinH]

Okay under Manjaro KDE, I can minimize the SpellcheckEditor window and it disappears down into the task bar. There is no obvious way to bring it back besides minimizing the entire Sigil app and then restoring it which brings the Spellcheck Editor back with it.

If I open two different Sigil applications, and try the same, when I hover over the single Taskbar Sigil icon, KDE shows me the two associated MainWindows in thumbnail size for me to select from.

But on Manjaro Linux, Sigil exhibits the exact same problem as reported by BettterRed in that when minimize the Spellcheck Editor then open a new different epub then un-minimize the Spellcheck Editor, it is showing the old data.

So minimization does not really work on anything that isn't the Main Application Window easily, at least not in a cross-platform way.

The problem with adding our own toolbar rollup button, is that it breaks all platform specific titlebars and you then have to create a crossplatform app titlebar from scratch with the extra buttons to rollup and rolldown.

So I do not see an easy solution to this. We would need to create a keyboard shortcut of some sort (as new title bar buttons will not work) that asks the current focus window for its current size, remembers it, and then tells that window to resize itself to absolutely minimum size (ie. just titlebar in height). If that same keyboard shortcut is used again on that same focus window, then re would need to restore it back to its original size.

I can easily use the macOS existing titlebar buttons and ask it to tile all that application's windows in some way but making it as small as possible is not one of those options.

Not sure how to best handle this.