Revert "resized chicken, rat and cow SVGs"

This reverts commit c1258ea77bf75047063f9f0a15305047523cabf8.
Revert "added mouse switch element to group_all in SVG"

This reverts commit 215346d7a43a5bd11f5e06ffa6dc03292d67c84a.
Revert "added group_all group to cow, rat and mouse SVGs"

This reverts commit eb72ebe2e49778934f9fbcfdbc81881eebb1b637.