[2.1.0d] Mod Archive stuck if using default download location

[marcin-szalski]

UI can get stuck if trying to download a module to the default location (i.e. HOME_DIRECTORY/modules/)

the download however works perfectly fine if that default location is changed to any existing directory

please find the attached videos

[marcin-szalski]

ma_videos.001.zip ma_videos.002.zip ma_videos.003.zip ma_videos.004.zip

videos in the attached zip file (divided into 4 parts because of github's policy)

[jllodra]

For the Hacktoberfest interested developer: This issue is easy to fix, the program has to alert the user (using a toast for instance) if the default download location for ModArchive files is not valid.

Check the Contributing.md file and also the Wiki for more information about running and building.

Thank you!

Feel free to ask for clarification.