Let regtest have its own qt settings (#3286)

Also, avoid messing up testnet settings while playing in regtest

Author: UdjinM6

src/qt/guiconstants.h

@@ -36,5 +36,6 @@ static const int MAX_URI_LENGTH = 255;
 #define QAPP_APP_NAME_DEFAULT "Dash-Qt"
 #define QAPP_APP_NAME_TESTNET "Dash-Qt-testnet"
 #define QAPP_APP_NAME_DEVNET "Dash-Qt-%s"
+#define QAPP_APP_NAME_REGTEST "Dash-Qt-regtest"
 
 #endif // BITCOIN_QT_GUICONSTANTS_H

src/qt/networkstyle.cpp

@@ -23,7 +23,7 @@ static const struct {
     {"main", QAPP_APP_NAME_DEFAULT, 0, 0, ""},
     {"test", QAPP_APP_NAME_TESTNET, 190, 20, QT_TRANSLATE_NOOP("SplashScreen", "[testnet]")},
     {"dev", QAPP_APP_NAME_DEVNET, 190, 20, "[devnet: %s]"},
-    {"regtest", QAPP_APP_NAME_TESTNET, 160, 30, "[regtest]"}
+    {"regtest", QAPP_APP_NAME_REGTEST, 160, 30, "[regtest]"}
 };
 static const unsigned network_styles_count = sizeof(network_styles)/sizeof(*network_styles);