fix(tabs): resolves issue where md-no-bar was throwing errors witho…

…ut `md-no-ink`

Closes #1182.

fix(subheader): fixes a z-index issue for fixed subheader

Closes #1034.

fix(styles): replaces css selector that was too general

Closes #1194.

feat(button): adds `md-mini` class for mini fab buttons

Closes #1173.

src/components/button/button.scss

@@ -5,6 +5,8 @@ $button-padding: 2px 6px 3px !default;
 $button-fab-width: 56px !default;
 $button-fab-height: 56px !default;
 $button-fab-padding: 16px !default;
+$button-fab-mini-width: 40px !default;
+$button-fab-mini-height: 40px !default;
 
 $button-fab-toast-offset: $button-fab-height * 0.75;
 
@@ -102,6 +104,14 @@ $button-fab-toast-offset: $button-fab-height * 0.75;
       margin-top: 0;
     }
 
+    &.md-mini {
+      width: $button-fab-mini-width;
+      height: $button-fab-mini-height;
+      md-icon {
+        line-height: $button-fab-mini-height;
+      }
+    }
+
   }
 
   &:not([disabled]) {

src/components/dialog/dialog.scss

@@ -39,7 +39,7 @@ md-dialog {
     overflow: auto;
     -webkit-overflow-scrolling: touch;
 
-    &:not([layout=row]) *:first-child {
+    &:not([layout=row]) > *:first-child {
       margin-top: 0px;
     }
   }

src/components/subheader/subheader.scss

@@ -44,6 +44,9 @@ $subheader-sticky-shadow: 0px 2px 4px 0 rgba(0,0,0,0.16) !default;
     }
 
     transition: 0.2s ease-out margin;
+    &.md-sticky-clone {
+      z-index: 2;
+    }
     &[sticky-state="active"] {
       margin-top: -2px;
     }

src/components/tabs/js/inkBarDirective.js

@@ -20,7 +20,7 @@ function MdTabInkDirective($$rAF) {
   };
 
   function postLink(scope, element, attr, ctrls) {
-    if (ctrls[0]) return;
+    var mdNoBar = !!ctrls[0];
 
     var tabsCtrl = ctrls[1],
         debouncedUpdateBar = $$rAF.debounce(updateBar);
@@ -31,7 +31,7 @@ function MdTabInkDirective($$rAF) {
 
     function updateBar() {
       var selected = tabsCtrl.getSelectedItem();
-      var hideInkBar = !selected || tabsCtrl.count() < 2;
+      var hideInkBar = !selected || tabsCtrl.count() < 2 || mdNoBar;
 
       element.css('display', hideInkBar ? 'none' : 'block');