Fix language selector alignment (#3306)

* Adjust language icon and caret in menu-bar
* remove unused style from `language-selector.css`

Author: chrisgarrity

src/components/language-selector/language-selector.css

@@ -1,10 +1,6 @@
 @import "../../css/colors.css";
 @import "../../css/units.css";
 
-.language-icon {
-    height:  1.5rem;
-}
-
 /* Position the language select over the language icon, and make it transparent */
 .language-select {
     position: absolute;

src/components/menu-bar/menu-bar.css

@@ -47,10 +47,11 @@
 
 .language-icon {
     height:  1.5rem;
+    vertical-align: middle;
 }
 
 .language-caret {
-    margin-bottom: .625rem;
+    margin: 0 .125rem;
 }
 
 .language-menu {
@@ -100,6 +101,10 @@
     padding: 0 0.75rem;
 }
 
+.menu-bar-item.language-menu {
+    padding: 0 0.5rem;
+}
+
 .menu-bar-menu {
     margin-top: $menu-bar-height;
     z-index: $z-index-menu-bar;