Checkbox height fix (#4619)

frappe/public/less/desk.less

@@ -897,6 +897,7 @@ li.user-progress {
 // custom font awesome checkbox
 input[type="checkbox"] {
 	position: relative;
+	height: 16px;
 
 	&:before {
 		position: absolute;
@@ -1101,4 +1102,4 @@ input[type="checkbox"] {
 		}
 	}
 
-}
+}