fix reply/return to annotation links

STUD-1629

common/lib/capa/capa/templates/annotationinput.html

@@ -1,5 +1,5 @@
 <form class="annotation-input">
-<div class="script_placeholder" data-src="/static/js/capa/annotationinput.js"/>
+<div class="script_placeholder" data-src="${STATIC_URL}js/capa/annotationinput.js"/>
 
 <div class="annotation-header">
     ${title}

common/lib/xmodule/xmodule/js/fixtures/annotatable.html

@@ -9,7 +9,7 @@
                 <a class="annotatable-toggle annotatable-toggle-instructions expanded" href="javascript:void(0)">Collapse Instructions</a>
             </div>
             <div class="annotatable-section-body annotatable-instructions">
-                <div><p>The main goal of this exercise is to start practicing the art of slow reading.</p>
+                <div><p>The main goal of this exercise is to start practicing the art of slow reading.</p></div>
             </div>
         </div>
         <div class="annotatable-section">

common/lib/xmodule/xmodule/js/src/annotatable/display.coffee

@@ -12,9 +12,9 @@ class @Annotatable
 
     # these selectors are for responding to events from the annotation capa problem type
     problemXModuleSelector:     '.xmodule_CapaModule'
-    problemSelector:            'section.problem'
-    problemInputSelector:       'section.problem .annotation-input'
-    problemReturnSelector:      'section.problem .annotation-return'
+    problemSelector:            'div.problem'
+    problemInputSelector:       'div.problem .annotation-input'
+    problemReturnSelector:      'div.problem .annotation-return'
 
     constructor: (el) ->
         console.log 'loaded Annotatable' if @_debug