implements `wsh run` command. lots of fixes (and new options) for command blocks. cleans up the UX/UI for command blocks. lots of bug fixes for blockcontrollers. other minor bug fixes.
also makes editor:* vars into settings override atoms.
This enables basic ssh for connections using publickey auth without a
passphrase. It can be established by creating a widget with the "meta"
property set to
```
{
"connection": "<user>@<host>:<port>"
}
```
where the :<port> is optional.
---------
Co-authored-by: sawka <mike.sawka@gmail.com>
