Issue title: Incorrect status when release "Push to talk" shortcut key
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### Steps to reproduce
1. Push "Push to talk" shortcut key
2. Start speaking
3. Continue speaking, but release the key

### Expected behaviour
Tell us what should happen

User status should be swithed to Listening

### Actual behaviour
Tell us what happens instead

User status is Speaking

### Configuration
**Operating system:**

Windows 10

**Version of Telegram Desktop:**

2.8.6 beta, but the same in the last stable

**Installation source (Linux Only)** - the official website / GitHub releases / flatpak / snap / distribution package:

**Used theme**:

<details><summary><b>Logs</b>:</summary>
Insert log.txt here (if necessary)
</details>

 Comments: 
 Comment 0: Hey there!

This issue was inactive for a long time and will be automatically closed in 30 days if there isn't any further activity. We therefore assume that the user has lost interest or resolved the problem on their own.

Don't worry though; if this is an error, let us know with a comment and we'll be happy to reopen the issue.

Thanks!

{'source': 'GithubIssues', 'repo_name_with_owner': 'telegramdesktop/tdesktop', 'issue_id': 938832070, 'repo_stars': 22236.0}