these edits ad 2 px to our tab height

- this adds some needed space above and below the text string
- increases tab text to 12 on mac (already 12 on windows)
- tabs buttons adjusted to align properly

auditors: @bbondy @bsclifton

less/button.less

@@ -22,8 +22,8 @@ span.buttonSeparator {
   background-color: @buttonColor;
   display: inline-block;
   width: 20px;
-  height: 12px;
-  margin: 8px 4px 0 0;
+  height: 13px;
+  margin: 9px 4px 0 0;
   cursor: default;
   -webkit-mask-image: url('../img/toolbar/menu_btn.svg');
   -webkit-mask-repeat: no-repeat;
@@ -68,7 +68,7 @@ span.buttonSeparator {
     line-height: 18px;
     width: 18px;
     height: 18px;
-    font-size: 12px;
+    font-size: 24px;
   }
 
   &.primaryButton,

less/navigationBar.less

@@ -886,8 +886,8 @@
 
     &.fa-lock,
     &.fa-unlock {
-      margin-top: 1px;
-      font-size: 16px;
+      margin-top: 2px;
+      font-size: 15px;
       min-height: 10px;
       min-width: 16px;
     }

less/tabs.less

@@ -53,8 +53,8 @@
 
   .newFrameButton {
     background: @buttonColor;
-    width: 14px;
-    height: 24px;
+    width: 15px;
+    height: 26px;
     line-height: 24px;
     -webkit-mask-image: url('../img/toolbar/newtab_btn.svg');
     -webkit-mask-repeat: no-repeat;
@@ -69,14 +69,13 @@
 }
 
 .tab {
-  // background: rgba(222, 222, 222, 0.6);
     background: linear-gradient(to bottom, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.1));
   border-radius: @borderRadiusTabs @borderRadiusTabs 0px 0px;
   border-width: 1px 1px 0;
   box-sizing: border-box;
   color: #3B3B3B;
   display: flex;
-  height: 22px;
+  height: 23px;
   margin-top: 2px;
   transition: transform 200ms ease;
   left: 0;
@@ -92,7 +91,7 @@
     -webkit-user-select: none;
     box-sizing: border-box;
     display: inline-block;
-    font-size: 11.5px;
+    font-size: 12px;
     overflow: hidden;
     text-overflow: ellipsis;
     line-height: 16px;
@@ -142,7 +141,7 @@
 
   &.active {
       background: linear-gradient(to bottom, white, @chromePrimary, );
-      height: 24px;
+      height: 25px;
       margin-top: 1px;
       box-shadow: inset 1px 1px 2px 0px white;
       box-shadow: 0px -1px 4px 0px rgba(51, 51, 51, 0.12);
@@ -347,7 +346,7 @@
     line-height: 19px !important;
     text-align: center;
     vertical-align: top;
-    margin-top: 2px;
+    margin-top: 4px;
     margin-left: -5px;
     margin-right: -5px;
     width: 30px;

less/variables.less

@@ -38,7 +38,7 @@
 @contextMenuFontSize: 14px;
 @audioColor: @highlightBlue;
 @focusUrlbarOutline: @highlightBlue;
-@siteSecureColor: @highlightBlue;
+@siteSecureColor: @buttonColor;
 @siteInsecureColor: #C63626;
 @siteEVColor: green;
 @loadTimeColor: @highlightBlue;
@@ -69,7 +69,7 @@
 
 @navbarHeight: 36px;
 @downloadsBarHeight: 50px;
-@tabsToolbarHeight: 26px;
+@tabsToolbarHeight: 28px;
 @tabPagesHeight: 9px;
 @bookmarksToolbarHeight: 24px;
 @bookmarksToolbarWithFaviconsHeight: 28px;