tweak wording of "out of networks" errors

modules/webadmin.cpp

@@ -821,7 +821,7 @@ public:
 				}
 			} else {
 				if (!spSession->IsAdmin() && !pUser->HasSpaceForNewNetwork()) {
-					WebSock.PrintErrorPage("Network number limit reached. Ask an admin to increase the limit for you, or delete few old ones from Your Settings");
+					WebSock.PrintErrorPage("Network number limit reached. Ask an admin to increase the limit for you, or delete unneeded networks from Your Settings.");
 					return true;
 				}