chore(docs): revert modal animations tweak

docs/styles/main/animations.less

@@ -1,6 +1,7 @@
 @import (reference) "../../bower_components/angular-motion/src/fade-and-slide/fade-and-slide.less";
+@import (reference) "../../bower_components/angular-motion/src/fade-and-scale/fade-and-scale.less";
 
-.modal {
+.modal.disabled {
 
   animation: noop !important;
 
@@ -19,7 +20,7 @@
         animation-name: fadeAndSlideFromTop;
       }
     }
-    &.ng-enter-active {
+    &.ng-enter-active, &.ng-leave-active {
       .modal-dialog {
         visibility: visible;
       }
@@ -33,6 +34,35 @@
 
   }
 
+  &.am-fade-and-scale {
+
+    .modal-dialog {
+      animation-duration: @fade-and-scale-duration;
+      animation-timing-function: @fade-and-scale-timing-function;
+      animation-fill-mode: backwards;
+      animation-name: fadeAndScaleIn;
+    }
+
+    &.ng-enter {
+      .modal-dialog {
+        visibility: hidden;
+        animation-name: fadeAndScaleIn;
+      }
+    }
+    &.ng-enter-active, &.ng-leave-active {
+      .modal-dialog {
+        visibility: visible;
+      }
+    }
+    &.ng-leave {
+      //@todo
+      .modal-dialog {
+        animation-name: fadeAndScaleOut;
+      }
+    }
+
+  }
+
 }
 
 @keyframes noop {