Fix for #301; copied file chooser behavior in ExportProjectWindow from NewProjectWindow.
Fix for #301; copied file chooser behavior in ExportProjectWindow from NewProjectWindow.

hksonngan/Polycode,carlosmarti/Polycode,zeebok/Polycode,Xetlin/Lua,thorsummoner/polycode,zeebok/Polycode,thorsummoner/polycode,fodinabor/Polycode,hksonngan/Polycode,fodinabor/Polycode,GovanifY/Polycode,mcanthony/Polycode,ivansafrin/Polycode,Xetlin/Lua,ivansafrin/Polycode,sshaileshk/Polycode,fodinabor/Polycode,sshaileshk/Polycode,GovanifY/Polycode,mcanthony/Polycode,thorsummoner/polycode,cartman300/Polycode,sshaileshk/Polycode,hksonngan/Polycode,zeebok/Polycode,cartman300/Polycode,cartman300/Polycode,fodinabor/Polycode,GovanifY/Polycode,ivansafrin/Polycode,carlosmarti/Polycode,hksonngan/Polycode,mcanthony/Polycode,cartman300/Polycode,Xetlin/Lua,carlosmarti/Polycode,mcanthony/Polycode,sshaileshk/Polycode,zeebok/Polycode,Xetlin/Lua,ivansafrin/Polycode,thorsummoner/polycode,GovanifY/Polycode