This is another mod from the creators of XCOM. This is a nice mod which makes the timer system fairer. This mod only starts the timer when your first soldier is spotted.

In vanilla XCOM 2, the battle timer starts even when you are just hiding and have not been spotted. True Concealment, however, does not tamper with the timer, but rather makes it fair. There are many mods which tamper with this timer, some making the timer stop completely, while others decreasing the timer for more grueling and difficult battles. XCOM 2 has battle timers which add a little bit of difficulty to the game. With the saved time, you can get to beating more aliens. Now, instead of clicking individual soldiers to evacuate them, a single click will do the job.

This is achieved by a button which the mod overlays in the game. What this mod does is that it evacuates all your troops in a single click. This is a simple mod, which should have been already present in the game. Evac All is another mod which sets out to make your life in XCOM 2 easier.