clean up design

app.py

@@ -131,7 +131,7 @@ def on_select_language(lang: str, require_has_math: bool, require_has_infobox: b
     )
     if idx == -1:
         return (-1, docs_cache, reader_iter, "No documents match filters.", "", {}, "", "", [], render_iframe(""))
-    return (idx, docs_cache, reader_iter, left, md, left_meta, header, right_md, info, right)
+    return (idx, docs_cache, reader_iter, left, left, left_meta, header, right_md, info, right)
 
 
 def show_doc(doc):
@@ -170,7 +170,7 @@ def on_prev(docs_cache, idx: int, reader_iter, require_has_math: bool, require_h
         left, left_meta, md, info, right, header = render_idx(docs_cache, i)
         if postfilters_ok(md, require_has_table, require_has_code):
             filtered_idx = i
-            return filtered_idx, docs_cache, reader_iter, left, md, left_meta, header, md, info, right
+            return filtered_idx, docs_cache, reader_iter, left, left, left_meta, header, md, info, right
     return idx, docs_cache, reader_iter, "No documents match filters.", "", {}, "", "", [], render_iframe("")
 
 
@@ -185,7 +185,7 @@ def on_next(docs_cache, idx: int, reader_iter, require_has_math: bool, require_h
     )
     if new_idx == -1:
         return idx, docs_cache, reader_iter, "No documents match filters.", "", {}, "", "", [], render_iframe("")
-    return new_idx, docs_cache, reader_iter, left, md, left_meta, header, right_md, info, right
+    return new_idx, docs_cache, reader_iter, left, left, left_meta, header, right_md, info, right
 
 
 with gr.Blocks() as demo:
@@ -207,10 +207,11 @@ with gr.Blocks() as demo:
                 with gr.Column(scale=1):
                     language_select = gr.Dropdown(choices=lang_list, value="en", label="Language")
                 with gr.Column(scale=2):
-                    require_has_math = gr.Checkbox(label="Has math", value=False)
-                    require_has_infobox = gr.Checkbox(label="Has infobox", value=False)
-                    require_has_table = gr.Checkbox(label="Has table", value=False)
-                    require_has_code = gr.Checkbox(label="Has pre/code", value=False)
+                    with gr.Row():
+                        require_has_math = gr.Checkbox(label="Has math", value=False)
+                        require_has_infobox = gr.Checkbox(label="Has infobox", value=False)
+                        require_has_table = gr.Checkbox(label="Has table", value=False)
+                        require_has_code = gr.Checkbox(label="Has pre/code", value=False)
     with gr.Row():
         with gr.Column():
             with gr.Tab("FineWiki markdown"):