INT-878 Tour close bug

Author: marcgurney

src/tour/index.jade

@@ -3,7 +3,7 @@
   #tour
     .modal-header
       h2 Welcome to MongoDB Compass
-      a.tour-close-button ×
+      button.tour-close-button ×
     #animation
       img#animation-gif(src="./images/tour/f0.gif")
     #features
@@ -23,14 +23,14 @@
         h3.feature-title View Documents
         p.feature-description Open the document drawer on the right to view the raw JSON documents in the result set.
       .pager
-        a.previous-slide.hide Previous
+        button.previous-slide.hide Previous
         ul
           li#f0.selected(data-n="0", title="Choose a collection")
           li#f1(data-n="1", title="Browse schema")
           li#f2(data-n="2", title="View data distribution")
           li#f3(data-n="3", title="Build queries")
           li#f4(data-n="4", title="View documents")
-        a.next-slide Next
+        button.next-slide Next
       .get-started-button-holder
         button#tour-remove.hide(type="button", class="btn btn-info") Get Started
 

src/tour/index.less

@@ -30,14 +30,16 @@
   background-color: @pw;
   -webkit-transform: translate(-50%, -50%);
 
-  a.tour-close-button {
+  button.tour-close-button {
     position: absolute;
     right: 10px;
     top: 0;
     color: @gray6;
     font-size: 28px;
     font-weight: 200;
     cursor: pointer;
+    border: none;
+    background: none;
 
     &:hover {
       text-decoration: none;
@@ -78,23 +80,25 @@
       position: relative;
       -webkit-user-select: none;
 
-      a {
+      button {
         position: absolute;
         display: block;
         color: @green2;
+        border: none;
+        background: none;
 
         &:hover {
           text-decoration: none;
           cursor: pointer;
         }
       }
-      a.previous-slide {
+      button.previous-slide {
         background: url('images/tour/pager-arrow-left.png') left 0 no-repeat;
         background-size: 10px 22px;
         padding: 1px 0 0 20px;
         left: 0;
       }
-      a.next-slide {
+      button.next-slide {
         background: url('images/tour/pager-arrow-right.png') right 0 no-repeat;
         background-size: 10px 22px;
         padding: 1px 20px 0 0;