Fixes #8385: update carousel captions

* No longer hidden by default--up to users to figure that part out with
longer content
* Cleaned up styles and spacing

less/carousel.less

@@ -129,11 +129,11 @@
 // -----------------------------
 .carousel-indicators {
   position: absolute;
-  bottom: 20px;
+  bottom: 10px;
   left: 50%;
   z-index: 15;
-  width: 100px;
-  margin-left: -50px;
+  width: 120px;
+  margin-left: -60px;
   padding-left: 0;
   list-style: none;
   text-align: center;
@@ -196,4 +196,9 @@
     right: 20%;
     padding-bottom: 30px;
   }
+
+  // Move up the indicators
+  .carousel-indicators {
+    bottom: 20px;
+  }
 }