Fix accessibilité et UX

Ref #4955 (closed)

prive/vignettes/ics.svg

-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" width="64" height="64">
  <path d="m 10.672 0 c -1.375 0 -2.672 1.355 -2.672 2.789 l 0 58.42 c 0 1.355 1.375 2.789 2.672 2.789 l 42.656 0 c 1.297 0 2.672 -1.434 2.672 -2.789 l 0 -43.21 -18 -18 m -27.328 0" style="fill:#dcdcdc;fill-opacity:1;stroke:none;fill-rule:nonzero"/>
  <path d="m 42 18 14 14 0 -14 z m 0 0" style="fill:#000;fill-opacity:0.196;stroke:none;fill-rule:nonzero"/>
  <path d="m 38 0 17.984 18 -15.227 0 c -1.348 0 -2.758 -1.426 -2.758 -2.773 m 0 -15.227" style="fill:#fff;fill-opacity:0.392;stroke:none;fill-rule:nonzero"/>