Move spinner to base css

app/assets/stylesheets/base.css.scss

@@ -59,3 +59,34 @@ span.caret {
 .markdown {
   height: 200px;
 }
+
+.spinner {
+  width: 40px;
+  height: 40px;
+  background-color: #333;
+
+  margin: 100px auto;
+  -webkit-animation: sk-rotateplane 1.2s infinite ease-in-out;
+  animation: sk-rotateplane 1.2s infinite ease-in-out;
+}
+
+@-webkit-keyframes sk-rotateplane {
+  0% { -webkit-transform: perspective(120px) }
+  50% { -webkit-transform: perspective(120px) rotateY(180deg) }
+  100% { -webkit-transform: perspective(120px) rotateY(180deg)  rotateX(180deg) }
+}
+
+@keyframes sk-rotateplane {
+  0% {
+    transform: perspective(120px) rotateX(0deg) rotateY(0deg);
+    -webkit-transform: perspective(120px) rotateX(0deg) rotateY(0deg)
+  }
+  50% {
+    transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg);
+    -webkit-transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg)
+  }
+  100% {
+    transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg);
+    -webkit-transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg);
+  }
+}

app/assets/stylesheets/statistics.css.scss

@@ -120,34 +120,3 @@ tr.highlight {
     }
   }
 }
-
-.spinner {
-  width: 40px;
-  height: 40px;
-  background-color: #333;
-
-  margin: 100px auto;
-  -webkit-animation: sk-rotateplane 1.2s infinite ease-in-out;
-  animation: sk-rotateplane 1.2s infinite ease-in-out;
-}
-
-@-webkit-keyframes sk-rotateplane {
-  0% { -webkit-transform: perspective(120px) }
-  50% { -webkit-transform: perspective(120px) rotateY(180deg) }
-  100% { -webkit-transform: perspective(120px) rotateY(180deg)  rotateX(180deg) }
-}
-
-@keyframes sk-rotateplane {
-  0% {
-    transform: perspective(120px) rotateX(0deg) rotateY(0deg);
-    -webkit-transform: perspective(120px) rotateX(0deg) rotateY(0deg)
-  }
-  50% {
-    transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg);
-    -webkit-transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg)
-  }
-  100% {
-    transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg);
-    -webkit-transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg);
-  }
-}