Botão no menu

Colocar na class do item do menu:

head_button_pt et_pb_button et_pb_button_0

Colocar no CSS do site:

/* Style Head button */
.head_button_pt > a{
padding-bottom: 0 !important;
color: white !important;
}

.et_mobile_menu li.head_button_pt.et_pb_button a {
padding:0;
}

Centrar texto verticalmente

Adicionar na ROW (verde) o seguinte código:

display: -webkit-box;
display: -ms-flexbox;
display: flex;
-webkit-box-align: center;
-ms-flex-align: center;
align-items: center;
-webkit-box-orient: horizontal;
-webkit-box-direction: normal;
-ms-flex-direction: row;
flex-direction: row;
-ms-flex-wrap: wrap;
flex-wrap: wrap;

Remover sidebar no Divi

Global:

/*** Take out the divider line between content and sidebar ***/
#main-content .container:before {background: none;}

/*** Expand the content area to fullwidth ***/
@media (min-width: 981px){
#left-area {
width: 100%;
padding: 23px 0px 0px !important;
float: none !important;
}
}

https://www.elegantthemes.com/blog/divi-resources/how-to-remove-sidebars-from-divi