BLOCKS: Added a method to reset to the default program

modules/juce_blocks_basics/blocks/juce_Block.h

@@ -304,6 +304,9 @@ public:
     /** Sets the current program as the block's default state. */
     virtual void saveProgramAsDefault() = 0;
 
+    /** Resets the loaded program to the block's default state. */
+    virtual void resetProgramToDefault() = 0;
+
     //==============================================================================
     /** Metadata for a given config item */
     struct ConfigMetaData

modules/juce_blocks_basics/topology/internal/juce_BlockImplementation.cpp

@@ -347,6 +347,15 @@ public:
             doSaveProgramAsDefault();
     }
 
+    void resetProgramToDefault() override
+    {
+        if (! shouldSaveProgramAsDefault)
+            setProgram (nullptr);
+
+        sendCommandMessage (BlocksProtocol::endAPIMode);
+        sendCommandMessage (BlocksProtocol::beginAPIMode);
+    }
+
     uint32 getMemorySize() override
     {
         return modelData.programAndHeapSize;