qt: Rename SetPrune() to InitializePruneSetting()

This function now resets the prune size and is only called after the
intro sequence.

src/qt/bitcoin.cpp

@@ -281,7 +281,7 @@ void BitcoinApplication::parameterSetup()
     m_node.initParameterInteraction();
 }
 
-void BitcoinApplication::SetPrune(bool prune)
+void BitcoinApplication::InitializePruneSetting(bool prune)
 {
     // If prune is set, intentionally override existing prune size with
     // the default size since this is called when choosing a new datadir.
@@ -564,7 +564,7 @@ int GuiMain(int argc, char* argv[])
 
     if (did_show_intro) {
         // Store intro dialog settings other than datadir (network specific)
-        app.SetPrune(prune);
+        app.InitializePruneSetting(prune);
     }
 
     if (gArgs.GetBoolArg("-splash", DEFAULT_SPLASHSCREEN) && !gArgs.GetBoolArg("-min", false))

src/qt/bitcoin.h

@@ -67,8 +67,8 @@ public:
     void parameterSetup();
     /// Create options model
     void createOptionsModel(bool resetSettings);
-    /// Update prune value
-    void SetPrune(bool prune);
+    /// Initialize prune setting
+    void InitializePruneSetting(bool prune);
     /// Create main window
     void createWindow(const NetworkStyle *networkStyle);
     /// Create splash screen