fix issue

templates/repo/createCourse.tmpl

@@ -39,9 +39,9 @@
 
                     <div class="inline required field">
                         <label>{{.i18n.Tr "repo.model.manage.label"}}</label>
-                        <div class="ui multiple search selection dropdown">
+                        <div class="ui multiple search selection dropdown" id="dropdown_container">
                             <input type="hidden" name="topics" value="">
-                            <div class="default text">{{.i18n.Tr "repo.repo_label_helpe"}}</div>
+                            <div class="default text" id="default_text">{{.i18n.Tr "repo.repo_label_helpe"}}</div>
                             <div class="menu" id="course_label_item">
                             </div>
                         </div>
@@ -75,7 +75,11 @@ $(document).ready(function(){
             $('#course_label_item').empty()
         }
     })
+    let defaultText = document.getElementById("default_text").offsetHeight
+    defaultText = defaultText>40 ? defaultText+12 :defaultText
+    $("#dropdown_container").css("height",defaultText)
     $('input.search').bind('input propertychange', function (event) {
+        $("#dropdown_container").removeAttr("style"); 
         const query  = $('input.search').val()
         if(!query){
             $('#course_label_item').empty()