Cleanup (unneeded) icon aliasing

This cleanup mainly focuses in horizontal/vertical lines that have
aliasing (likely due to misaligned scaling from some source)

Author: veger

Yafc/Data/Icons/Add.png

@@ -29,6 +29,7 @@ Date:
         - You can now open projects from a Windows context-menu. If the project was not opened before, then Yafc uses
           the launch-settings from the most-recently opened project.
         - Move the Legacy Summary and Import from clipboard buttons to the main/hamburger menu.
+        - Clean up (unneeded) aliassing from icons.
     Bugfixes:
         - Several fixes to the legacy summary page, including a regression in 0.8.1.
         - Crafters with no enery_source no longer make Yafc refuse to solve the page.