add back missing annotation SVG files

web/images/annotation-check.svg

@@ -0,0 +1,3 @@
+<svg height="40" width="40" xmlns="http://www.w3.org/2000/svg">
+  <path d="M2.379,14.729 5.208,11.899 12.958,19.648 25.877,6.733 28.707,9.561 12.958,25.308z" fill="#333333"></path>
+</svg>

web/images/annotation-comment.svg

@@ -0,0 +1,3 @@
+<svg height="40" width="40" xmlns="http://www.w3.org/2000/svg">
+  <path d="M16,5.333c-7.732,0-14,4.701-14,10.5c0,1.982,0.741,3.833,2.016,5.414L2,25.667l5.613-1.441c2.339,1.317,5.237,2.107,8.387,2.107c7.732,0,14-4.701,14-10.5C30,10.034,23.732,5.333,16,5.333z" fill="#333333"></path>
+</svg>