.o_field_mass_mailing_html {
    textarea.o_codeview {
        font-family: 'Courier New', Courier, monospace;
        width: 100%;
        outline: none;
        resize: none;
        right: auto;
        height: 100%;
        border: none;
        overflow: hidden;
    }
    .o_mass_mailing_code_view {
        position: sticky;
        top: 50px;
        height: fit-content;
    }
}