Beam Mod Manager: all versions and old releases

- Two mods with the same file name added at the same moment can no longer overwrite each other in Mod Storage, and turning a mod on no longer overwrites a file that appears in the game or server folder at the same moment.
- Share links: one network can now create a limited number of links per day, so a single user can't switch sharing off for everyone. Only a scrambled, two-day record of the network is kept, never the address itself.
- The live dashboard stops sending data to the window while it's minimized.
- Security: the app's window can no longer open network connections of its own (BMM's internet access stays in its background process, as before), and downloads of share covers and supporter pictures stop as soon as they pass their size limit.