Improve Uninstallers to handle closing the Station app

[loonggamma]

Context
On MacOS and Linux, if a user is running Massa Station while uninstalling it using Terminal command.
In such case, if user wants to reinstall station, the error appears when trying to open the Wallet module.

The need:
Make sure that uninstall->reinstall flow leads to no errors for user in case he didn't close station during Uninstallation.
User flow
MacOS:

• uninstall via command
  (meanwhile, the Wallet module icon was in my launchpad, and Station was running, in the icon tray)
• install from Landing page
• open Station -> Launch wallet
• the 502 error instead of the wallet's homepage.

How to

• For ICO quests we are adding the step to uninstallation for users
• - As improvement, we could handle the closing of the Station during the uninstallation, in case it's still running.

Technical details
Give the technical insights so anyone in the team can tackle the tasks - Dev

QA testing
Does this task require some QA tests ?
If yes, explain how to validate it