Small fixes

Fix an issue raised by multitroid

Retroarch crash fix

Fix some crash related to the RetroArch support.

SD2Snes file upload fix

Fixed an issue with sending file request.

RetroArch multihost support

The RetroArch support now allows connecting to multiple RetroArch hosts including the SNES Classic. See the Readme to learn more about it.

SMZ3 Multiworld domain/url have be updated.

Bug fixes

This should fix some issue when using multiple application on the same device when one is writing memory.

Also a small fix in the updater to place qfile2snes update correctly.

QFile2snes improvment

Major QFile2Snes improvement:

• Local files view show classic headers (size/type) and allow for sorting.
• Can create directory.
• Should prevent from creating directory when drag&dropping directory.

Windows Updater change

• QUsb2Snes will update the updater before running it
• Error message when QUsb2snes is running and can't update

This should be one of the last releases before 0.8

Revert to Qt 5.12 for Windows

This a dumb release with a dumb release version
The Win updater does not work with Qt 5.13 anyways

Improved emulators support

• RA support should be better
• Snes9x better handle Hirom/exHirom

Fix snes classic support

This make SNES classic support works again.
Also fix some RetroArch crash
Better RetroArch support should come next release.

Small Fixes - Better MacOs/Linux integration

• Fix some RetroArch stuff, should work fine with bsnes-mercury core
• Logs and config file will go to proper path under Linux/Mac Os
• SD2Snes support improved under Linux