[Bug] Fix extension check for requirements

[light-and-ray]

Description

"Extension"/"Requires" in extension metadata.ini just doesn't work

If required extension disabled, there is no error log
If requiring extension disabled and required extension doesn't exist, there is false error text

Checklist:

• I have read contributing wiki page
• I have performed a self-review of my own code
• My code follows the style guidelines
• My code passes tests