updated docs for collapsible #448

Author: gselderslaghs

src/collapsible.html

@@ -18,7 +18,9 @@
           <ul class="collapsible collapsible-accordion">
             <li>
               <div class="collapsible-header">
-                <i class="material-icons">filter_drama</i>First</div>
+                <i class="material-icons">filter_drama</i>
+                <div class="collapsible-header-content">First</div>
+              </div>
               <div class="collapsible-body">
                 <span>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore
                   magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
@@ -31,7 +33,9 @@
             </li>
             <li>
               <div class="collapsible-header">
-                <i class="material-icons">place</i>Second</div>
+                <i class="material-icons">place</i>
+                <div class="collapsible-header-content">Second</div>
+              </div>
               <div class="collapsible-body">
                 <span>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore
                   magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
@@ -40,7 +44,9 @@
             </li>
             <li>
               <div class="collapsible-header">
-                <i class="material-icons">whatshot</i>Third</div>
+                <i class="material-icons">whatshot</i>
+                <div class="collapsible-header-content">Third</div>
+              </div>
               <div class="collapsible-body">
                 <span>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore
                   magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea