Update windows switching script to use Active Process and Class instead of using the window title

[gayashanbc]

Description

There could be instances where the Window title of an application is dynamic (https://github.com/JuanmaMenendez/AutoHotkey-script-Open-Show-Apps/issues/9#issuecomment-889870991). Example: IntelliJ IDEA, Windows Explorer

In such cases, the current logic to switch app windows won't work

Proposed Changes

Use Active Process combined with Active Class to get the list of windows of the current app instead of using the Active Window title.