Make export-name editable independently of project name

[MysterE-vW]

Right now, changing the project name in the project settings will change not just the project name, but also the window title and the name of the export. When you're exporting to the web, the page title will thus be the project name. If I wanted to make different exports (say, one being the 'test' and another being 'My Game') I'd either have to change the project name every time I'm trying a new export or to manually change the title in the exported html-file every time. I think it would be useful to have a "Export name" or "Title" setting in the export-editor that doesn't change the project name or any directory, but just the window/page name of the export.