Fixed Firefox rendering issue

frontend/delta/css/clipperz.css

@@ -693,6 +693,8 @@ input[type=text] {
 /* Firefox considers 100% respect to height of the whole window, this is rule is necessary to eliminate the card toolbar offset. */
 @-moz-document url-prefix() {
   #mainPanel.extra-wide .subpanel.cardContent {
+    height: calc(100% - 50px); }
+  #mainPanel.wide .cardContent {
     height: calc(100% - 50px); } }
 #mainPanel {
   left: 0px; }

frontend/delta/scss/core/layout.scss

@@ -106,6 +106,12 @@ input[type=text] {
 				}
 			}
 		}
+
+		&.wide {
+				.cardContent {
+					height: calc(100% - 50px);
+				}
+		}
 	}
 
 }

frontend/delta/scss/core/mixin.scss

@@ -215,3 +215,5 @@ refer to http://www.clipperz.com.
 	-moz-background-size: 3px 3px;
 	background-size: 3px 3px;
 }
+
+