add symbol for clear button and simplify roll_col css selector

refresh_symbol = '\U0001f504'  # 🔄

save_style_symbol = '\U0001f4be'  # 💾

apply_style_symbol = '\U0001f4cb'  # 📋

trash_prompt_symbol = '\U0001F5D1' # 🗑🗑🗑

def plaintext_to_html(text):

            paste = gr.Button(value=paste_symbol, elem_id="paste")

            save_style = gr.Button(value=save_style_symbol, elem_id="style_create")

            prompt_style_apply = gr.Button(value=apply_style_symbol, elem_id="style_apply")

            trash_prompt = gr.Button(value=trash_prompt_symbol, elem_id="trash_prompt")

            token_counter = gr.HTML(value="<span></span>", elem_id=f"{id_part}_token_counter")

            token_button = gr.Button(visible=False, elem_id=f"{id_part}_token_button")

    padding: 0.4em 0;

}

#roll, #paste, #style_create, #style_apply{

#roll_col > button {

    min-width: 2em;

    min-height: 2em;

    max-width: 2em;