Added fade-in to ember settings panes

Closes #2749
- Add fade-in class to settings panes headers and contents

ghost/admin/templates/settings/apps.hbs

@@ -1,9 +1,9 @@
-<header>
+<header class="fade-in">
     <button class="button-back">Back</button>
     <h2 class="title">Apps</h2>
 </header>
 
-<section class="content">
+<section class="content fade-in">
     <ul class="js-apps">
         {{#each availableApps}}
         <li>

ghost/admin/templates/settings/debug.hbs

@@ -1,7 +1,7 @@
-<header>
+<header class="fade-in">
     <h2 class="title">General</h2>
 </header>
-<section class="content">
+<section class="content fade-in">
     <form id="settings-export">
         <fieldset>
             <div class="form-group">

ghost/admin/templates/settings/general.hbs

@@ -1,4 +1,4 @@
-<header>
+<header class="fade-in">
     <button class="button-back">Back</button>
     <h2 class="title">General</h2>
     <section class="page-actions">
@@ -6,7 +6,7 @@
     </section>
 </header>
 
-<section class="content">
+<section class="content fade-in">
     <form id="settings-general" novalidate="novalidate">
         <fieldset>
 

ghost/admin/templates/settings/user.hbs

@@ -1,4 +1,4 @@
-<header>
+<header class="fade-in">
     <button class="button-back">Back</button>
     <h2 class="title">Your Profile</h2>
     <section class="page-actions">
@@ -6,7 +6,7 @@
     </section>
 </header>
 
-<section class="content no-padding">
+<section class="content no-padding fade-in">
 
     <header class="user-profile-header">
         <img id="user-cover" class="cover-image" {{bind-attr src=cover title=coverTitle}} />