Permaproto boards cause Fritzing to lag

The problem, and a suggested fix, are described in this forum post: https://forum.fritzing.org/t/adafruit-permaproto-causes-lag/5994/8. I can confirm that the files attached in that post fix the lag for me.

A user named `smithyinc` posted:

> [...] I figured out that the cause of the lag on my MacOS machine was a super complicated background layer in the Icon and Breadboard SVGs. I have removed the overly complicated layer with a simplified one and “generic-ized” some of the common Adafruit Perma Proto boards.

Start with the linked forum post and compare the referenced Icon and Breadboard SVGs with the attached replacement files. Verify that the Adafruit Perma Proto board assets use the simplified background and genericized variants, then confirm in Fritzing that the lag is reduced.

Written by the indexing model from the issue text.