#23 opencity should let the user choose the filename for the opencity.save file

[Markus Koschany]

Hello,

This bug report was originally reported to Debian's bugtracker. It's a different feature request than "implement a multiple-slot mechanism" hence I'm filing this new report.

http://bugs.debian.org/657788

"Instead of implementing a multiple-slot save mechanism, I think
that the game should let the user choose the filename for the
save file (currently ~/.opencity/opencity.save).

When the user clicks on the save button, the city should be saved
to the currently loaded one, if any. Otherwise, a dialog should
ask the user which filename he/she would like to use and then
save to ~/.opencity/<chosenfilename>.opencitysave
(please note the appended filename extension).
There should also be a "save as" button, just like in typical editing
programs...</chosenfilename>

This way, there would not be a limited number of save slots, but
an unlimited number, provided enough space is available in the
user's home directory..."