v2.3

[hotfix] fix app crash due to icon path issue. Icon is back.
[optimize] optimize method of accessing GPIB bus.
[New feature] check app update periodically, every 7 days.
[New feature] save & recall setup of oscilloscope to built-in memory slots.

Windows: ScopeCapt.v2.3.Installer.exe
MacOS: ScopeCapt.v2.3.app.zip