Make images in notes responsive

static/css/home.css

@@ -26,6 +26,10 @@ file, You can obtain one at http://mozilla.org/MPL/2.0/.
     background-color: rgba(255,255,255,0.15);
 }
 
+.note-text img {
+    max-width: 100%;
+}
+
 .note-text table {
     border-spacing: 0px;
     border-collapse: collapse;