Use correct loading mode of Bootstrap-Markdown

data-provide="markdown-editable" is intended for inline editing of page
content à la contenteditable. When this is applied to a textarea, the
editor is loaded only after the user clicks on the field. This behavior
breaks focus and is incompatible with keyboard navigation.

app/views/admin/venues/_form.html.haml

@@ -14,7 +14,7 @@
       .col-md-8
         = semantic_form_for(@venue, url: admin_conference_venue_path(@conference.short_title)) do |f|
           = f.inputs :name, :website
-          = f.input :description, input_html: { rows: 5, cols: 20, data: { provide: 'markdown-editable' } }, hint: markdown_hint
+          = f.input :description, input_html: { rows: 5, cols: 20, data: { provide: 'markdown' } }, hint: markdown_hint
           = f.label 'Venue Logo'
           %br
           - if @venue.picture?