SL-15249 FIXED The F1 key does not close the guidebook after clicking a link

indra/newview/llfloaterhowto.cpp

@@ -83,3 +83,16 @@ LLFloaterHowTo* LLFloaterHowTo::getInstance()
 {
     return LLFloaterReg::getTypedInstance<LLFloaterHowTo>("how_to");
 }
+
+BOOL LLFloaterHowTo::handleKeyHere(KEY key, MASK mask)
+{
+	BOOL handled = FALSE;
+
+	if (KEY_F1 == key )
+	{
+		closeFloater();
+		handled = TRUE;
+	}
+
+	return handled;
+}

indra/newview/llfloaterhowto.h

@@ -44,6 +44,8 @@ class LLFloaterHowTo :
 
     void onOpen(const LLSD& key) override;
 
+    virtual BOOL handleKeyHere(KEY key, MASK mask);
+
     static LLFloaterHowTo* getInstance();
 
     bool matchesKey(const LLSD& key) override { return true; /*single instance*/ };