fix(content-switcher): set height in button container instead of butt…

…on (#3758)

The latest code that dictates the height of content switcher buttons is
introduced in #2085, whereas the height of their (the buttons')
container is dictated by code from older commit. Given the issue #2085
refers to (#1956) seems to request simply for the button's height and
doesn't seem to mention how buttons' height should work with their
container's height, this change moves the code to define the height
back to the container.

Fixes #3751.

packages/components/src/components/content-switcher/_content-switcher.scss

@@ -19,7 +19,7 @@
     display: flex;
     justify-content: space-evenly;
     width: 100%;
-    height: rem(32px);
+    height: rem(40px);
   }
 
   .#{$prefix}--content-switcher--disabled {
@@ -35,7 +35,6 @@
     display: inline-flex;
     align-items: center;
     width: 100%;
-    height: rem(40px);
     padding: $carbon--spacing-03 $carbon--spacing-05;
     margin: 0;
     white-space: nowrap;