Merge branch 'master' into pr/10951

Conflicts:
	dist/css/bootstrap.min.css
	less/modals.less

less/modals.less

@@ -10,14 +10,6 @@
 // Kill the scroll on the body
 .modal-open {
   overflow: hidden;
-
-
-  // Account for hiding of scrollbar
-  body&,
-  .navbar-fixed-top,
-  .navbar-fixed-bottom {
-    margin-right: 15px
-  }
 }
 
 // Container that the modal scrolls within
@@ -30,8 +22,11 @@
   right: 0;
   bottom: 0;
   left: 0;
+  z-index: @zindex-modal;
+
+  // Prevent Chrome on Windows from adding a focus outline. For details, see
+  // https://github.com/twbs/bootstrap/pull/10951.
   outline: 0;
-  z-index: @zindex-modal-background;
 
   // When fading in the modal, animate it to slide down
   &.fade .modal-dialog {
@@ -43,11 +38,9 @@
 
 // Shell div to position the modal with bottom padding
 .modal-dialog {
-  margin-left: auto;
-  margin-right: auto;
+  position: relative;
   width: auto;
-  padding: 10px;
-  z-index: (@zindex-modal-background + 10);
+  margin: 10px;
 }
 
 // Actual modal
@@ -70,7 +63,7 @@
   right: 0;
   bottom: 0;
   left: 0;
-  z-index: (@zindex-modal-background - 10);
+  z-index: @zindex-modal-background;
   background-color: @modal-backdrop-bg;
   // Fade for backdrop
   &.fade { .opacity(0); }
@@ -108,7 +101,7 @@
   padding: (@modal-inner-padding - 1) @modal-inner-padding @modal-inner-padding;
   text-align: right; // right align buttons
   border-top: 1px solid @modal-footer-border-color;
-  .clearfix(); // clear it in case folks use .pull-* classes on buttons
+  &:extend(.clearfix all); // clear it in case folks use .pull-* classes on buttons
 
   // Properly space out buttons
   .btn + .btn {
@@ -130,8 +123,7 @@
 
   .modal-dialog {
     width: 600px;
-    padding-top: 30px;
-    padding-bottom: 30px;
+    margin: 30px auto;
   }
   .modal-content {
     .box-shadow(0 5px 15px rgba(0,0,0,.5));