fix png transparency

convert -background none rest/static/clip/icon.svg -size 48x48  -define png:compression-level=9 -define png:compression-filter=4 -strip rest/static/clip/48.png

rest/static/clip/clip-favicon.svg

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
-  Source: https://commons.wikimedia.org/wiki/File:Clipboard_(1714)_-_The_Noun_Project.svg
-  Author: Seth Taylor, CC0, via Wikimedia Commons
-  License: https://creativecommons.org/publicdomain/zero/1.0/deed.en
--->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" x="0px" y="0px" viewBox="0 0 71 100" enable-background="new 0 0 71 100" xml:space="preserve">
-<rect fill="#fff" y="10" x="15" width="60" height="85"/>
-<path d="M70,7.583H56.625V5.961c0-0.55-0.45-1-1-1H43.443V2c0-1.1-0.9-2-2-2H29.557c-1.1,0-2,0.9-2,2v2.961H15.375  c-0.55,0-1,0.45-1,1v1.623H1c-0.55,0-1,0.45-1,1V99c0,0.55,0.45,1,1,1h69c0.55,0,1-0.45,1-1V8.583C71,8.034,70.55,7.583,70,7.583z   M35.5,2.319c1.094,0,1.981,0.887,1.981,1.98c0,1.094-0.888,1.981-1.981,1.981c-1.094,0-1.981-0.887-1.981-1.981  C33.519,3.206,34.406,2.319,35.5,2.319z M63.495,92.395c0,0.55-0.45,1-1,1H8.505c-0.55,0-1-0.45-1-1V15.188c0-0.55,0.45-1,1-1h5.87  v1.669c0,0.55,0.45,1,1,1h40.25c0.55,0,1-0.45,1-1v-1.669h5.87c0.55,0,1,0.45,1,1V92.395z"></path><rect x="14.375" y="25.5" width="38.125" height="2.375"></rect><rect x="14.375" y="31.625" width="38.125" height="2.375"></rect><rect x="14.375" y="37.75" width="29.125" height="2.375"></rect><rect x="14.375" y="50" width="38.125" height="2.375"></rect><rect x="14.375" y="56.125" width="38.125" height="2.375"></rect><rect x="14.375" y="62.25" width="29.125" height="2.375"></rect></svg>