Rework button styles on repo and commit page (#3104)

Author: silverwind

public/css/index.css

@@ -152,11 +152,13 @@ pre, code {
         box-shadow: none;
     }
 
-    /* overide semantic selector '.ui.menu:not(.vertical) .item > .button' */
-    .menu:not(.vertical) .item .button {
-        padding-bottom: .78571429em;
-        padding-top: .78571429em;
-        font-size: 1em;
+    /* Overide semantic selector '.ui.menu:not(.vertical) .item > .button' */
+    /* This fixes the commit graph button on the commits page */
+    .menu:not(.vertical) .item > .button.compact {
+        padding: .58928571em 1.125em;
+    }
+    .menu:not(.vertical) .item > .button.small {
+        font-size: .92857143rem;
     }
 
     .text {

public/less/_base.less

@@ -6,7 +6,7 @@
 		<div class="ui secondary menu">
 		{{template "repo/branch_dropdown" .}}
 			<div class="fitted item">
-				<a href="{{.RepoLink}}/graph" class="ui basic small button">
+				<a href="{{.RepoLink}}/graph" class="ui basic small compact button">
 					<span class="text">
 						<i class="octicon octicon-git-branch"></i>
 					</span>