[Geany] split window bug

[Thomas Martitz]

Enrico Tröger schrieb:
> possibilities:
> - fix Scintilla so that widgets can be reparented
> - find out what is causing this weird behaviour on Windows and ideally
> fix it

Maybe you could have a look at notepad++'s implementation of split 
windows. It doesn't use gtk (but the windows api), but it uses 
scintilla, which makes me think it's not necessarily a scintilla issue.