Chatterino window is too tall (for other apps) on Windows

[Nerixyz]

Checklist

• I'm reporting a problem with Chatterino
• I've verified that I'm running the most recent nightly build or stable release
• I've looked for my problem on the wiki
• I've searched the issues and pull requests for similar looking reports

Describe your issue

When taking a screenshot of Chatterino with ShareX, the detected bounds are too large (see screenshot). This is a bug in Chatterino, not ShareX.

In normal window placement (non-maximized), the window is 1px too tall. When maximized, the window is 8px too tall (or rather: dpr * 8px).

This is caused by the added margins.

Since Telegram seems to get this right (source), I used their handler in try/nccalcsize. I added that fix to my dpi branch locally (as they both modify the same code). I'll push some day.

Linking to #4868 and #3690 which both touch related code. I could probably integrate that into my PR, since it already removes the resize-fixing.

Screenshots

Maximized:

OS and Chatterino Version

Chatterino Nightly 7.4.5 (commit 2abb9c3) built on 2023-09-17 with Qt 6.5.0, MSVC 193732822 Running on Windows 10 Version 22H2, kernel: 10.0.19045