Implement important sites dialog for desktop.

ui/webui/resources/cr_elements/cr_dialog/cr_dialog.html

Index: ui/webui/resources/cr_elements/cr_dialog/cr_dialog.html
diff --git a/ui/webui/resources/cr_elements/cr_dialog/cr_dialog.html b/ui/webui/resources/cr_elements/cr_dialog/cr_dialog.html
index 2747f0e648fdf5e0b014fc00deb63a31e3300da5..ba2f09c0848b26b6448bc975fcd61df03cbdfb63 100644
--- a/ui/webui/resources/cr_elements/cr_dialog/cr_dialog.html
+++ b/ui/webui/resources/cr_elements/cr_dialog/cr_dialog.html
@@ -46,10 +46,12 @@
       }
 
       #close {
+        align-self: flex-start;

[dschuyler, 2017/04/07 00:02:06]

All the --vars go before the other entries e.g.

--paper-icon-button:
-webkit-margin-end:
align-self:
margin-top:

(I know that Polymer for example sorts alphabetically, ignoring the hyphens (so
it would be correct there), while this code sorts with the hyphens as part of
the label (so '-' comes before 'a')).

[dullweber, 2017/04/07 09:39:21]

Done.

         --paper-icon-button: {
           height: 40px;
           width: 40px;
         };
+        margin-top: 6px;
         -webkit-margin-end: 6px;
         /* <paper-icon-button> overrides --iron-icon-{height,width}, so this
          * padding essentially reduces 40x40 to 20x20. */