Alexander Agnarson on "[Theme: Hueman] Responsive Dropdown Menu"

1) This will fix it for mobile - tablets use the same view as desktop, so it should be fine there!
2) Yup! Edit header.php with a child theme and locate (the second spot for header menu, so it's not topbar):

<div class="nav-text"><!-- put your mobile menu text here --></div>

And do like:

<div class="nav-text">Navigation</div>

or something similar. And then add some css styling as you wish:

#nav-header .nav-text { color: #444; font-weight: 600; }