fix/memory-leak

[Emilia228x]

@localhost /usr/lib/OpenTaiko Hub env WEBKIT_DISABLE_COMPOSITING_MODE=1 GDK_BACKEND=x11 OpenTaiko-Hub

** (OpenTaiko-Hub:17303): WARNING **: 22:57:58.979: WEBKIT_FORCE_SANDBOX no longer allows disabling the sandbox. Use WEBKIT_DISABLE_SANDBOX_THIS_IS_DANGEROUS=1 instead.

Failed to create shared memory: Слишком много открытых файлов

[IepIweidieng]

Failed to create shared memory: Слишком много открытых файлов

Translates to: Failed to create shared memory: Too many open files

Which means the actual issue is unable to open files, unrelated to memory leaks.

[IepIweidieng]

The "The theme(mode).json file (or the settings folder) doesn't exist" is a separate bug caused by wrong setting folder path on Linux.

[Mr-Kaos]

Running OpenTaiko Hub on any version above 0.1.5 fails to display anything in the application window and jsut shows "Failed to create shared memory: Too many open files" in the terminal.

Tried with the .deb and AppImage versions.

Running Linux Mint 22.