make extras tab collumns resizable

modules/ui_postprocessing.py

 import gradio as gr
 from modules import scripts, shared, ui_common, postprocessing, call_queue, ui_toprow
 import modules.infotext_utils as parameters_copypaste
+from modules.ui_components import ResizeHandleRow
 
 
 def create_ui():
     dummy_component = gr.Label(visible=False)
     tab_index = gr.Number(value=0, visible=False)
 
-    with gr.Row(equal_height=False, variant='compact'):
+    with ResizeHandleRow(equal_height=False, variant='compact'):
         with gr.Column(variant='compact'):
             with gr.Tabs(elem_id="mode_extras"):
                 with gr.TabItem('Single Image', id="single_image", elem_id="extras_single_tab") as tab_single: