Feature suggestion: option to forbid uploads from installing via app

[fasterthanlime]

Opened by @quyse at itchio/itch#1336

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Our game's uploads are portable builds (state-of-the-art, folders pushed via butler, with .itch.toml and everything ;) ). However I'm thinking about adding additional uploads to the game, namely a .msi installer for Windows, and .deb files for Ubuntu's, assuming it's going to be easier for those non tech-savvy guys who doesn't use the itch app. But, then when someone tries to install our game via the app, the app is going to ask them what file to install, and it's not going to handle .msi and .deb files smoothly in case user chose them, is it? Of course uploads are to be named appropriately (like Portable/Installer/Ubuntu 16.04 .deb Package), but it's probably still hard to make the right choice for normal users of the app (they may not know that installer is bad for the app).

Maybe it would be nice to have an option for developer to prohibit certain uploads from being installed by the app?