Add new partial for greeting, intro text and logo (if present) to use in ALL emails

Adjust maximum size of logo and improve responsive behaviour on small screens (display logo centered and above text)

app/assets/stylesheets/mail/email.scss

@@ -181,6 +181,10 @@ a {
 img.float-right {
   float: right;
   display: block;
+  max-width: 100px;
+  max-height: 100px;
+  margin-bottom: 15px;
+  margin-left: 15px;
 }
 
 del.quantity_was {
@@ -379,6 +383,10 @@ ul {
   }
 }
 
+.greeting_and_intro {
+  overflow: hidden;
+}
+
 /* Let's make sure tables in the content area are 100% wide */
 
 /* Odds and ends */
@@ -445,6 +453,7 @@ ul {
 
   img.float-right {
     float: none !important;
+    margin: 0px auto 15px;
   }
 }
 

app/views/shared/mailers/_greeting_and_intro.html.haml

@@ -0,0 +1,8 @@
+.greeting_and_intro
+  - if @enterprise_for_logo
+    = image_tag @enterprise_for_logo.logo_url(:medium), class: "float-right"
+
+  %h4
+    = greeting
+  %p
+    = intro