wxH GUI: To point filename in confirm-message on saving a file

[MikhailKasimov]

Hello!

GUI cosmetic issue. When user closes tab with unsaved file, he get Do you want to save file? confirm window.

If user closes wxH window with couple of tabs with unsaved files, he can get a mess on what file is asked to be save now.

So, the idea is to point filename in confirm-message on saving a file (see screen).

Do you want to save file? --> Do you want to save **11111** file? (filename is bold).