[ENH] utils: Minimize imports for utils

[ales-erjavec]

Avoid PyQt imports in orangecanvas.utils module.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 60.00000% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.19%. Comparing base (9c8e8fc) to head (e5e821e).

Files with missing lines	Patch %	Lines
orangecanvas/gui/utils.py	45.45%	6 Missing ⚠️
orangecanvas/utils/__init__.py	71.42%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #345      +/-   ##
==========================================
- Coverage   76.22%   76.19%   -0.03%     
==========================================
  Files         102      102              
  Lines       21329    21332       +3     
==========================================
- Hits        16258    16254       -4     
- Misses       5071     5078       +7     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.