[Cleanup] Make GUI error messages less technical

[CastagnaIT]

Description

Make GUI error messages less technical

Motivation and context

as suggested from comment: #1828 (comment)

How has this been tested?

Screenshots (if appropriate):

Types of change

• Bug fix (non-breaking change which fixes an issue)
• Clean up (non-breaking change which removes non-working, unmaintained functionality)
• Improvement (non-breaking change which improves existing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that will cause existing functionality to change)
• Cosmetic change (non-breaking change that doesn't touch code)
• None of the above (please explain below)

Checklist:

• I have read the Contributing document
• My code follows the Code Guidelines of this project
• My change requires a change to the Wiki documentation
• I have updated the documentation accordingly

[CastagnaIT]

CC @ksooo

[ksooo]

1. If you want to make the messages less technical, then pointing users to the log is not a good approach. Most of the users have no idea how to read the log, and many of them do not even know where to find the log. For Kodi 22 we removed the "see log for details" part of many error message strings., for exactly this reason

2. If this is for end users, these string should be localizable.

[CastagnaIT]

done