Add paper_trail

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

@@ -11,8 +11,8 @@
       = f.input :reasoning, input_html: { rows: 5, data: { provide: 'markdown-editable' } }, required: true,
         label: 'How it fits the conference'
       = f.input :submitter_relationship, input_html: { rows: 5, data: { provide: 'markdown-editable' } }, required: true,
-        label: 'Your personal relationship with the organization you are applying for',
-        hint: 'e.g. employee, member of the open source community etc'
+        label: 'Submitter\'s relation',
+        hint: 'e.g. employee, comunity manager, etc'
       = f.input :website_url
       = responsibles_selector_input f
       = image_tag f.object.picture.thumb.url if f.object.picture?

app/views/admin/booths/index.html.haml

@@ -33,7 +33,8 @@
             %td
               = booth.id
             %td
-              = image_tag(booth.picture.thumb.url, width: '20%')
+              - if booth.logo_link
+                = image_tag(booth.picture.thumb.url, width: '20%')
             %td
               = link_to booth.title, admin_conference_booth_path(@conference.short_title, booth)
             %td