Fix infinite request spinner when cancelling "Send and Download" (#2721)
Fix infinite request spinner when cancelling "Send and Download" (#2721)

We were hiding the spinner at the end of the _handleSendAndDownloadRequestWithEnvironment method. However, we
were exiting early we the user cancel the save dialog (L672).

To prevent that, I've moved the code in a finally block, therefore we make sure that the spinner will be hidden

Closes #2718
getinsomnia/insomnia,getinsomnia/insomnia,getinsomnia/insomnia