ENH: doxygen - re-added css for OpenFOAM tables

doc/Doxygen/customdoxygen.css

@@ -65,4 +65,24 @@
     -ms-transform: translateY(-50%);
     content: "C++ Source Code Guide";
     font-size: 180%;
-}
+}
\ No newline at end of file
+
+.OFTable {
+    width: 100%;
+    border: 0px;
+    margin-top: 10px;
+    margin-bottom: 10px;
+    background-color: rgb(245,245,245);
+    padding: 5px;
+}
+
+
+.OFTable th {
+    text-align: left;
+    padding: 5px;
+    border-bottom: 2px solid rgb(175,175,175);
+}
+
+.OFTable td {
+    padding-left: 5px;
+}