bug(web): multitouch longpress + keyboard swap causes a gesture error

@jahorton here.

Following the instructions from the repro at https://github.com/keymanapp/keyman/issues/6978#issuecomment-1263043835, #6978 does not reproduce in standalone Web/iOS. That said, if the keyboard is swapped (instead of using "shift")...

Sentry Issue: [KEYMAN-WEB-7D](https://sentry.io/organizations/keyman/issues/3645736115/?referrer=github_integration)

```
Error: Potential fat-finger key could not be found in layer!
at reduceConsoleArgs (/private/var/mobile/Containers/Shared/AppGroup/0ECBE4EA-68DA-4D82-99A8-EF07851FDE5A/keyman/keyman-sentry.js:879:45)
at reportingConsoleWarn (/private/var/mobile/Containers/Shared/AppGroup/0ECBE4EA-68DA-4D82-99A8-EF07851FDE5A/keyman/keyman-sentry.js:866:64)
at None (/keyman.js:229:74)
at None (/keyman.js:226:113)
at None (/keyman.js:625:343)
...
(7 additional frame(s) were not displayed)
```

Granted, this is likely a pretty extreme edge case. I was attempting to reproduce a different bug by following that repro and found this one instead. Sentry declared the error report to be a "new issue"; seems like my repro attempt for a different bug was the first time this edge case has been triggered?

So, while probably low priority... given that I know _exactly_ what caused these reports, I may as well mark down the repro, in case we run into it again (or into something else that's related) in the future.