Portable mode

Hi, the program creates a file on:
C:\Users\USERNAME\AppData\Local\LessMsi\lessmsi-gui.exe_Url_2f40pggqe2qwc3oufnjnqq0l3gqel3k3\1.6.91.0\user.config

It would awesome if it were created only on the same folder where the executable is, so that it can be used as portable on a USB pendrive, and without leave traces.
Cheers.

The issue only points to the generated `...\user.config` location under LocalAppData. First, reproduce it by running `lessmsi-gui.exe` and confirming where the config folder is created. Then trace the startup/settings initialization that determines user config storage and evaluate whether portable-mode config path can be redirected to the executable directory. Done when execution creates config beside the exe and stops creating the `AppData\Local\LessMsi\...\user.config` path.

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