[BUG] disconnect from servers if extension deactivate

[r-hannuschka]

Describe the bug
Servers are not disconnect if the extension is closed

To Reproduce
add 2 servers and close one, the log only shows the extension get deactivated but the connections are not closed to the servers so the sessions still alive.

Expected behavior
Connections should be closed if we deactivate the extension

Screenshots
If applicable, add screenshots to help explain your problem.

the log shows that we connect to 2 servers, after the first one the extension host has started again thats why we start connect to the first server.

After all servers are connected, we simply remove the first server which disconnects rhannuschka.windows-10 but the extension host restarts again and the extension gets deactivated. After that we connect again to production-click-core.fortune and open a new session on this on without close the connection we opens before.

The sam will happens if we close vsqlik simply.

[2020-10-15 19:11:09] [VsQlik] [info] extension activated
[2020-10-15 19:11:16] [VsQlik] [info] added workspace foldeer rhannuschka.windows-10
[2020-10-15 19:11:16] [VsQlik.Connection] [info] connect to server: windows-10-privat.shared
[2020-10-15 19:11:16] [VsQlik] [info] deactivate extension
[2020-10-15 19:11:18] [VsQlik.Connection] [info] connect to server: windows-10-privat.shared
[2020-10-15 19:11:18] [VsQlik] [info] extension activated
[2020-10-15 19:11:21] [VsQlik.Connection] [info] connected to server: windows-10-privat.shared
[2020-10-15 19:11:35] [VsQlik] [info] added workspace foldeer qlik core fortune
[2020-10-15 19:11:35] [VsQlik.Connection] [info] connect to server: production-qlik-core.fortune.com
[2020-10-15 19:11:36] [VsQlik.Connection] [info] connected to server: production-qlik-core.fortune.com
[2020-10-15 19:12:37] [VsQlik] [info] removed workspace foldeer rhannuschka.windows-10
[2020-10-15 19:12:37] [VsQlik.Connection] [info] close connection to rhannuschka.windows-10
[2020-10-15 19:12:37] [VsQlik] [info] deactivate extension
[2020-10-15 19:12:39] [VsQlik.Connection] [info] connect to server: production-qlik-core.fortune.com
[2020-10-15 19:12:39] [VsQlik] [info] extension activated
[2020-10-15 19:12:41] [VsQlik.Connection] [info] connected to server: production-qlik-core.fortune.com