[Request] Hide 'HTTP Error' toast after attempt succeeds

[mvastola]

I have an issue where I have intermittent network connectivity.

When I don't have internet and this widget tries to refresh my calendar, I get a toast message on the bottom of the widget saying HTTP Error 0: Could not connect. Will try again soon. It obviously makes perfect sense to show this sort of message.

There is one slight irritation though: when this problem clears up and the widget next succeeds in fetching my calendar, this error does not disappear. Instead, I have to manually close it each time, even though it is no longer relevant.

Can you please fix this? Alternatively, could you/someone point me to documentation for how I would clear an error? I'd be more than happy to submit a PR, but I'm not at all familiar with this API.

Thanks so much.

PS: This looks like it might be a dup of # #273, but I thought I could lay out the problem a bit more clearly.

[mvastola]

Update: this was even simpler than I thought. Just create a PR at #293