fix:Optimized the style of the dataset configuration page and added the l… (#8655)

### What problem does this PR solve?

Optimized the style of the dataset configuration page and added the
logic of cancelling submission
[#3221](https://github.com/infiniflow/ragflow/issues/3221)

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/locales/en.ts

@@ -207,6 +207,7 @@ export default {
         'Update your knowledge base configuration here, particularly the chunking method.',
       name: 'Knowledge base name',
       photo: 'Knowledge base photo',
+      photoTip: 'You can upload a file with 4 MB',
       description: 'Description',
       language: 'Document language',
       languageMessage: 'Please input your language!',