Bug 1475025 - Vertically center the various error pages r=johannh

--HG--
extra : rebase_source : 3f43e92511c39a58e7bcb1e524175490dcf24639

browser/base/content/aboutNetError.js

@@ -178,7 +178,6 @@ function initPage() {
   }
   if (showCaptivePortalUI) {
     initPageCaptivePortal();
-    updateContainerPosition();
     return;
   }
   if (gIsCertError) {
@@ -295,7 +294,6 @@ function initPage() {
       span.textContent = document.location.hostname;
     }
   }
-  updateContainerPosition();
 }
 
 function updateContainerPosition() {

browser/themes/shared/aboutNetError-new.css

@@ -13,6 +13,7 @@ body.certerror {
   border-color: #ffe900;
   border-width: 16px;
   width: 100%;
+  justify-content: normal;
 }
 
 body.captiveportal .title {

toolkit/themes/shared/in-content/info-pages.inc.css

@@ -17,6 +17,7 @@ body {
   min-height: 100vh;
   padding: 40px 48px;
   align-items: center;
+  justify-content: center;
 }
 
 body.wide-container {