Add icon to "Open in full view" link on PDF preview (#22483).

git-svn-id: https://svn.redmine.org/redmine/trunk@24588 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/assets/images/icons.svg

@@ -335,6 +335,12 @@
       <path d="M11 16a1 1 0 1 0 2 0a1 1 0 0 0 -2 0"/>
       <path d="M8 11v-4a4 4 0 1 1 8 0v4"/>
     </symbol>
+    <symbol viewBox="0 0 24 24" stroke-linecap="round" stroke-linejoin="round" id="icon--maximize">
+      <path d="M4 8v-2a2 2 0 0 1 2 -2h2"/>
+      <path d="M4 16v2a2 2 0 0 0 2 2h2"/>
+      <path d="M16 4h2a2 2 0 0 1 2 2v2"/>
+      <path d="M16 20h2a2 2 0 0 0 2 -2v-2"/>
+    </symbol>
     <symbol viewBox="0 0 24 24" stroke-linecap="round" stroke-linejoin="round" id="icon--message">
       <path d="M8 9h8"/>
       <path d="M8 13h6"/>

app/views/common/_pdf.html.erb

@@ -1,5 +1,5 @@
 <p class="pdf-full-view-link">
-  <%= link_to l(:label_open_in_full_view, :default => l(:button_download)), path %>
+  <%= link_to sprite_icon('maximize', l(:label_open_in_full_view)), path, :class => 'icon icon-maximize' %>
 </p>
 <div class="filecontent pdf">
   <object data="<%= path %>" type="application/pdf">

config/icon_source.yml

@@ -256,3 +256,5 @@
   svg: file-type-xls
 - name: file-type-ppt
   svg: file-type-ppt
+- name: maximize
+  svg: maximize