Image Viewer: Replace QGraphicsScene based view with QListView

[ales-erjavec]

Issue

Fixes gh-198

Description of changes

• Replace QGraphicsScene based view with QListView in IconMode.

Includes

• [X] Code changes
• [ ] Tests
• [ ] Documentation

[codecov[bot]]

Codecov Report

Merging #199 (d786193) into master (62a5be7) will increase coverage by 1.30%. The diff coverage is 62.76%.

:exclamation: Current head d786193 differs from pull request most recent head 8a40166. Consider uploading reports for the commit 8a40166 to get more accurate results

@@            Coverage Diff             @@
##           master     #199      +/-   ##
==========================================
+ Coverage   66.86%   68.17%   +1.30%     
==========================================
  Files          13       17       +4     
  Lines        3033     2856     -177     
  Branches      439      403      -36     
==========================================
- Hits         2028     1947      -81     
+ Misses        886      794      -92     
+ Partials      119      115       -4     

[PrimozGodec]

@ales-erjavec Thanks for this. It looks/works very good. Is it ready to merge?

[ales-erjavec]

Is it ready to merge?

Yes