Merge pull request #380 from lcalaresu/issue-369-add-attachment-closing-X-and-filedate-overlaps

Fix CSS to avoid collision with nextcloud server 'date' class.

css/mail.css

@@ -326,7 +326,7 @@
 
 .mail-message-summary-from,
 .mail-message-summary-subject,
-.date {
+.mail-message-summary .date {
 	display: inline-block;
 	padding: 12px;
 	white-space: nowrap;
@@ -347,7 +347,7 @@
 	margin-left: 37px;
 }
 
-.date {
+.mail-message-summary .date {
 	position: absolute;
 	right: 0;
 	top: 0;