fixes #10073: add width: 100%; for ie10 and below to size svg.img-responsive correctly

less/mixins/image.less

@@ -8,6 +8,7 @@
 // Keep images from scaling beyond the width of their parents.
 .img-responsive(@display: block) {
   display: @display;
+  width: 100% \9; // Force IE10 and below to size SVG images correctly
   max-width: 100%; // Part 1: Set a maximum relative to the parent
   height: auto; // Part 2: Scale the height according to the width, otherwise you get stretching
 }