Added list of constraints to the tables page.

Last column shows the full textual definition until I have decided on
a better way to visualize the details.

pglablib/PgConstraint.h

@@ -9,16 +9,19 @@
 #include <vector>
 
 enum class ConstraintType {
-	Check,  // c
-	ForeignKey, // f
 	PrimaryKey, // p
+	ForeignKey, // f
 	Unique, // u
+	Check,  // c
 	ConstraintTrigger, // t
 	ExclusionConstraint, // x
 };
 
 void operator<<(ConstraintType &s, const Pgsql::Value &v);
 
+QString ShortNameForConstraintType(ConstraintType ct);
+QString LongNameForConstraintType(ConstraintType ct);
+
 
 enum class ForeignKeyAction {
 	NoAction, // a