fix: Let CKEditor decide on size of panels (#674)

Author: fsbraun

djangocms_text_ckeditor/static/djangocms_text_ckeditor/css/cms.ckeditor.css

@@ -83,7 +83,6 @@
 /* scrollable dropdowns on touch */
 .cke_panel {
     overflow-y: auto !important;
-    height: auto !important;
     max-height: 300px !important;
 
     -webkit-overflow-scrolling: touch !important;