Fifo analyzer: Fix various XF mistakes

* 'hangle' was a typo
* Light colors include an alpha value, so they should be 8 characters, not 6
* The XF command format adds 1 to the count internally (so 0 is one word), but we need to subtract that back to produce a valid command
* XFMEM_POSTMATRICES was calculating the row by subtracting XFMEM_POSMATRICES (POS vs POST), resulting in incorrect row numbering

Source/Core/DolphinQt/FIFO/FIFOAnalyzer.cpp

@@ -224,7 +224,7 @@ public:
     const auto [name, desc] = GetXFTransferInfo(address, count, data);
     ASSERT(!name.empty());
 
-    const u32 command = address | (count << 16);
+    const u32 command = address | ((count - 1) << 16);
 
     text = QStringLiteral("XF  %1  ").arg(command, 8, 16, QLatin1Char('0'));