updated quickstart tutorial

Author: utz82

docs/manual.html

@@ -515,7 +515,7 @@
     </tr></table><br><br>
     <b>Step 3:</b> Move the cursor up to the first position in the sequence again. Now press <b>[2nd]</b>. This will bring up the pattern screen.<br><br>
     <img src="data/tut2.png"><br><br><br>
-    <b>Step 4:</b> Let's activate RowPlay mode, so we can hear what we're doing. Press <b>[ALPHA],[MODE],[ALPHA].</b><br><br><br>
+    <b>Step 4:</b> Let's activate RowPlay mode, so we can hear what we're doing. Press <b>[ALPHA],[MODE].</b><br><br><br>
     <b>Step 5:</b> Ok, let's put some notes into this pattern thing. Press <b>[PRGM],[PRGM]</b>.<br><br><br>
     <b>Step 6:</b> Wow, that's a pretty low note. Let's change the octave by pressing <b>[GRAPH],[2]</b>. Now we can enter some more notes, for example
     by pressing <b>[PRGM],[PRMG],[SIN],[SIN],[TAN],[TAN]</b>.<br><br><img src="data/tut3.png"><br><br><br>