Client update button and force update

**Is your feature request related to a problem? Please describe.**
Users are lazy and don't update clients as often as they should. -> Scam proposals

**Describe the solution you'd like**
The client needs a inbuilt one click update solution.
Alert the user to update the client version, by clicking on the update button.
When there are important security update, the client should force the user to make the update.

**Describe alternatives you've considered**
None

No files, tests, or entry points are named. Start by mapping how the client identifies its version and delivers releases, then inspect the existing notification and security-update flows. Done should include a defined one-click update path and a clear policy for when updates are mandatory.

Written by the indexing model from the issue text.