Added tooltip to airdate on posters view

UI/Series/series.less

@@ -50,10 +50,18 @@
     opacity: 0.75;
     width: 138px;
 
+    :hover {
+      cursor: default;
+    }
+
     .label {
       margin-top: 3px;
       display: block;
     }
+
+    .tooltip {
+      opacity: 1;
+    }
   }
 .series-season {
   padding-bottom: 20px;
@@ -75,8 +83,8 @@
     -webkit-transform-origin: 50% 50%;
     position: absolute;
     width: 300px;
-    top: 180px;
-    left: -120px;
+    top: 175px;
+    left: -122px;
     text-align: center;
   }
 }