Shortcut Ctrl+` not working when launching CopyQ with Czech keyboard on Windows

_UPDATE: Parts which turned out to be probably irrelevant, were either removed or striked-through. And new findings were added._

**Describe the bug**
If I set a global keyboard shortcut `` Ctrl+` `` for a command, it doesn't get mapped (i. e. it doesn't do anything) after Windows/CopyQ restarts when Czech keyboard layout is active. But when I use a shortcut like `Ctrl+Alt+B`, there is no problem.

**Workaround (how to avoid the problem)**
1) Always start Windows / CopyQ with English keyboard layout,
2) don't forget to have English activated when assigning the `` Ctrl+` `` shortcut. ~~or when saving the CopyQ preferences. And "English" can be possibly exchanged for any other keyboard layout preferred by a user.~~

**To Reproduce**
Steps to reproduce the behavior:
1. Go to the CopyQ's preferences window, switch to the Shortcuts tab.
2. Assign shortcut `` Ctrl+` `` to the `Show/hide main window` command, while having English keyboard layout active.

3. Close the window.
4. Press the shortcut (this means: pressing the same physical keys as above) - the CopyQ's window appears = correct.
5. Switch to a different keyboard layout - from English to Czech in our case.
6. Press the shortcut - the CopyQ's window disappears = correct.
7. ~~Log off from Windows and log in again.~~ UPDATE: It is enough just to quit CopyQ and start it again while Czech keyboard layout is active.
8. Press the shortcut - the CopyQ's window doesn't appear = BUG.
**Expected behavior**
Any shortcut assigned to a command should work at any moment, including the moment after CopyQ is restarted while whatever keyboard layout is active.

**Screenshots**
n/a

**Version, OS and Environment**
- Application Version [3.10.0] or newer
- OS [Windows 10] (with Czech locale)

**Additional context and findings**
There is also a historical bug #427 that coped with keyboard shortcuts and which might be related to this one.

For example Visual Studio Code handles the `` Ctrl+` `` shortcut correctly:
* with English layout, it shows (and maps to) `` Ctrl+` ``
* with Czech layout, it shows (and maps to) `` Ctrl+; ``

When pressing `` Ctrl+` `` in CopyQ's popup for assigning shortcut with Czech layout activated, CopyQ shows it thinks `` Ctrl+° `` was pressed, which seems incorrect and such shortcut, when saved, is not working in any scenario.

This is contrary to for example Czech's `` Ctrl+š `` (this is equivalent to pressing `` Ctrl+3 `` with English layout) - this gets correctly recognized and working when saved as a shortcut - and even when starting CopyQ with English layout active.