erp5_corporate_identity: fix logo position when it has descirption

bt5/erp5_corporate_identity/SkinTemplateItem/portal_skins/erp5_corporate_identity/Letter_createLetterHeader.zpt

@@ -61,7 +61,7 @@ Generates the letter header
   <tal:block metal:define-macro="letter_header">
     <div class="ci-letter-header">
 		  <div class="ci-letter-bar">
-		    <div class="ci-letter-bar-logo">
+		    <div tal:attributes="class python: 'ci-letter-bar-logo' if letter_theme_logo_alt else 'ci-letter-bar-logo ci-letter-bar-logo-without-description'">
   		      <img tal:attributes="src python: letter_theme_logo_url;
     		                           alt python: letter_theme_logo_alt" />
             <span tal:content="letter_theme_logo_alt"></span>

bt5/erp5_corporate_identity/SkinTemplateItem/portal_skins/erp5_corporate_identity/template_css/letter.pdf.css.css

@@ -59,8 +59,11 @@ html {
 .ci-letter .ci-letter-header .ci-letter-bar-logo {
   margin-left: 5%;
 }
+.ci-letter .ci-letter-bar-logo.ci-letter-bar-logo-without-description {
+  padding: .5em .5em .15em 0;
+}
 .ci-letter .ci-letter-bar-logo {
-  padding: .5em .5em .1em 0;
+  padding: .5em .5em .4em 0;
 }
 .ci-letter .ci-letter-bar-logo {
   text-align: left;