Pressing F1 key while Main Form has focus is not opening correct help topic.

[rffrasca]

Describe the bug
Pressing F1 key on the keyboard while on the main form should open the Using PDFKeeper help topic. Instead, the Welcome topic is opened.

To Reproduce
Steps to reproduce the behavior:

1. Click anywhere on main form to get focus.
2. Press 'F1' key on the keyboard.
3. Help dialog will open Welcome topic.

Expected behavior
Using PDFKeeper topic should have been open in the help dialog.

Screenshots
N/A

Desktop (please complete the following information):

• OS: Windows 10 22H2
• Browser: N/A
• Browser Version: N/A
• PDFKeeper Version: 11.2.1

Database (please complete the following information):

• DBMS: N/A
• Version: N/A

Additional context
N/A