ADD: add url prefix in display page image uploading request

Author: liveipooli(李为)

webapp/app/containers/Display/components/SettingForm.tsx

@@ -345,7 +345,7 @@ export class SettingForm extends React.Component<ISettingFormProps, ISettingForm
             [item.name]: false
           }
         }, () => {
-          formItemChange(item.name)(response.payload)
+          formItemChange(item.name)('/api/rest_s/v1/visualis' + response.payload)
         })
       }
     }
@@ -354,7 +354,6 @@ export class SettingForm extends React.Component<ISettingFormProps, ISettingForm
       formItemChange(item.name)(null)
       e.stopPropagation()
     }
-
     return (
       <Row>
         <Col span={24}>

webapp/app/containers/Display/sagas.ts

@@ -174,7 +174,7 @@ export function* uploadCurrentSlideCover (action: DisplayActionType) {
       method: 'post',
       data: formData
     })
-    const coverPath = asyncData.payload
+    const coverPath = '/api/rest_s/v1/visualis' + asyncData.payload
     yield put(currentSlideCoverUploaded(coverPath))
     resolve(coverPath)
   } catch (err) {