Hide widgets with bad svg

[chennes]

Refactor the icon generation code to pull it out of the main AddonManager.py file, and to make it much more error-tolerant (and to make the errors it doesn't handle clearer to the end user who has to see them).

[Copilot]

Pull Request Overview

This PR refactors icon generation code to improve error handling and make it more tolerant of invalid SVG data. The code is extracted from the main AddonManager.py file into a dedicated utilities module to improve maintainability.

Key changes:

• Extract icon utilities into separate module with comprehensive error handling
• Replace simple icon creation with robust validation and fallback mechanisms
• Remove verbose logging statements from metadata loading

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
addonmanager_icon_utilities.py	New utility module containing extracted icon generation code with improved error handling and SVG validation
AddonManagerTest/gui/test_icon_utilities.py	Comprehensive test suite for the new icon utilities module
AddonManager.py	Remove icon generation code and update imports to use new utilities module
AddonCatalog.py	Remove verbose logging statements from metadata loading

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