Update blocktime for DRGX

Difficulty, longestchain, and some other data does not render in UI and needs to be fixed. Halving calculations also need to be reviewed for accuracy for DRGX.

src/controller.cpp

@@ -322,7 +322,7 @@ void Controller::getInfoThenRefresh(bool force)
         int difficulty           = reply["difficulty"].get<json::number_integer_t>();
         int num_halvings         = 1; // number of halvings that have occured already
         int blocks_until_halving = (num_halvings*1680000 + 340000) - curBlock;
-        int blocktime            = 75;
+        int blocktime            = 30;
         int halving_days         = (blocks_until_halving * blocktime) / (60 * 60 * 24) ;
         int longestchain         = reply["longestchain"].get<json::number_integer_t>();
         int notarized            = reply["notarized"].get<json::number_integer_t>();