BLENDER: Only hide dropzone when no files have been uploaded

Upstream patch at go-gitea#35156

Author: bartvdbraak

web_src/js/features/repo-issue.ts

@@ -547,7 +547,14 @@ function initIssueTemplateCommentEditors(commentForm: HTMLFormElement) {
       // deactivate all markdown editors
       showElem(commentForm.querySelectorAll('.combo-editor-dropzone .form-field-real'));
       hideElem(commentForm.querySelectorAll('.combo-editor-dropzone .combo-markdown-editor'));
-      hideElem(commentForm.querySelectorAll('.combo-editor-dropzone .form-field-dropzone'));
+      queryElems(commentForm, '.combo-editor-dropzone .form-field-dropzone', (dropzoneContainer) => {
+        const dropzoneEl = dropzoneContainer.closest<HTMLElement>('.combo-editor-dropzone')?.querySelector<HTMLElement>('.dropzone');
+        const dzInstance = dropzoneEl?.dropzone;
+
+        if (dzInstance && dzInstance.files.length === 0) {
+          hideElem(dropzoneContainer);
+        }
+      });
 
       // activate this markdown editor
       hideElem(fieldTextarea);