remove stroke= and style= attributes from dashboard.svg

Signed-off-by: Private Maker <privatemaker@posteo.net>

core/img/categories/dashboard.svg

@@ -1 +1 @@
-<svg width="16" height="16" version="1.1" viewbox="0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path d="m7.9062 1a7 7 0 0 0-6.9062 7 7 7 0 0 0 7 7 7 7 0 0 0 7-7 7 7 0 0 0-7-7 7 7 0 0 0-0.09375 0zm0.09375 2.6992a4.3 4.3 0 0 1 4.3008 4.3008 4.3 4.3 0 0 1-4.3008 4.3008 4.3 4.3 0 0 1-4.3008-4.3008 4.3 4.3 0 0 1 4.3008-4.3008z" stroke-dashoffset="10" stroke-linecap="round" stroke-linejoin="round" stroke-width=".5" style="paint-order:markers stroke fill"/></svg>
+<svg width="16" height="16" version="1.1" viewbox="0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path d="m7.9062 1a7 7 0 0 0-6.9062 7 7 7 0 0 0 7 7 7 7 0 0 0 7-7 7 7 0 0 0-7-7 7 7 0 0 0-0.09375 0zm0.09375 2.6992a4.3 4.3 0 0 1 4.3008 4.3008 4.3 4.3 0 0 1-4.3008 4.3008 4.3 4.3 0 0 1-4.3008-4.3008 4.3 4.3 0 0 1 4.3008-4.3008z"/></svg>