grouped $topbar-dropdown vars together. Add $topbar-dropdown-link-color-hover for the option of having a separate color for hovering drop elements. Dropdown elements previously had an option for a text color, but not for a hover text color
fix $topbar-menu-icon-color-toggled not working b/c of wrong div selection. Then fix top-bar @include hamburger from overrideing $topbar-menu-icon-color-toggled on hover
pass "" to hamburger($hover-color) instead of leaving it empty
there is $topbar-arrows boolean switch, but no $topbar-dropdown-arrows switch to turn off dropdown sub nav arrows. Added that with an if statement and var
Merge pull request #5856 from chillmania/added-topbar-dropdown-arrows-switch

Added topbar dropdown arrows switch