log level revert and minor startup fixes

src/main/java/com/sparrowwallet/sparrow/AppServices.java

@@ -441,6 +441,7 @@ public class AppServices {
 
     @Subscribe
     public void fiatCurrencySelected(FiatCurrencySelectedEvent event) {
+        if(ratesService != null) {
             ratesService.cancel();
 
             if(Config.get().getMode() != Mode.OFFLINE && event.getExchangeSource() != ExchangeSource.NONE) {
@@ -448,6 +449,7 @@ public class AppServices {
                 ratesService.start();
             }
         }
+    }
 
     @Subscribe
     public void exchangeRatesUpdated(ExchangeRatesUpdatedEvent event) {

src/main/java/com/sparrowwallet/sparrow/net/Bwt.java

@@ -96,7 +96,7 @@ public class Bwt {
         }
 
         bwtConfig.verbose = log.isDebugEnabled() ? 2 : 0;
-        if(!log.isInfoEnabled()) {
+        if(!log.isDebugEnabled()) {
             bwtConfig.setupLogger = false;
         }
 

src/main/java/com/sparrowwallet/sparrow/preferences/GeneralPreferencesController.java

@@ -58,6 +58,8 @@ public class GeneralPreferencesController extends PreferencesDetailController {
     public void initializeView(Config config) {
         if(config.getBitcoinUnit() != null) {
             bitcoinUnit.setValue(config.getBitcoinUnit());
+        } else {
+            bitcoinUnit.setValue(BitcoinUnit.AUTO);
         }
 
         bitcoinUnit.valueProperty().addListener((observable, oldValue, newValue) -> {

src/main/resources/logback.xml

@@ -22,7 +22,7 @@
         </encoder>
     </appender>
 
-    <root level="debug">
+    <root level="info">
         <appender-ref ref="FILE" />
         <appender-ref ref="STDOUT" />
     </root>