Minor graphical improvements

- Uniform style of SVGs
- Add style directly inside SVGs to switch to dark mode - the previous solution didn't work in Chromium for some reason

templates/default/assets/washing.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" viewBox="0 0 64 64"><g id="layer" class="washing-svg"><path d="M31.94,21C22.05,21,14,29.05,14,38.94c0,9.89,8.05,17.94,17.94,17.94c9.89,0,17.94,-8.05,17.94,-17.94C49.87,29.05,41.83,21,31.94,21zM31.94,52.87C24.25,52.87,18,46.62,18,38.94c0,-7.68,6.25,-13.94,13.94,-13.94c7.69,0,13.94,6.25,13.94,13.94C45.88,46.62,39.63,52.87,31.94,52.87z" style="fill:#000"/><path d="M6,4v56c0,2,2,4,4,4h44c2,0,4,-2,4,-3.998983V3.9642939C58,2,56,0,54.031875,0H10C8,0,6,2,6,4zM54,4v10H10V4zM10,60v-42h44v42z" style="fill:#000;fill-opacity:1;stroke:none;stroke-opacity:1"/><rect x="40" y="7" width="10" height="4" style="fill:#000;fill-opacity:1;stroke:none;stroke-width:7;stroke-opacity:1"/></g></svg>
+<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100"><style>@media (prefers-color-scheme:dark){*{stroke:#fff!important}}</style><path d="M49.906 34.936c-14.282 0-25.908 11.625-25.908 25.908 0 14.282 11.626 25.908 25.908 25.908 14.283 0 25.908-11.626 25.908-25.908C75.8 46.56 64.19 34.936 49.906 34.936Z" style="fill:none;stroke:#000;stroke-width:5;stroke-dasharray:none;stroke-opacity:1"/><path d="M11.406 24.812h77.188z" style="fill:none;fill-opacity:1;stroke:#000;stroke-width:5.02733;stroke-dasharray:none;stroke-opacity:1"/><path d="M11.406 8.438v83.124c0 2.97 2.969 5.938 5.938 5.938h65.312c2.969 0 5.938-2.969 5.938-5.936V8.384c0-2.915-2.969-5.884-5.89-5.884h-65.36c-2.969 0-5.938 2.969-5.938 5.938Z" style="fill:none;fill-opacity:1;stroke:#000;stroke-width:5;stroke-dasharray:none;stroke-opacity:1"/><rect width="16.439" height="3.387" x="63.322" y="11.869" rx=".264" ry="1.694" style="fill:none;fill-opacity:1;stroke:#000;stroke-width:3.86216;stroke-dasharray:none;stroke-opacity:1"/></svg>