Fix #303422: Importing colored lyrics from MusicXML

Up to 3.5 it worked only for first line (number="1"), in 3.6 and master it stopped working all together

Backport of musescore#8033, resp. duplicate of musescore#8034. See also musescore#6021

Author: Jojo-Schmitz

importexport/musicxml/importmxmlpass2.cpp

@@ -5359,8 +5359,10 @@ void MusicXMLParserLyric::parse()
 
       //qDebug("formatted lyric '%s'", qPrintable(formattedText));
       lyric->setXmlText(formattedText);
-      if (lyricColor != QColor::Invalid)
-            lyric->setColor(lyricColor);
+      if (lyricColor != QColor::Invalid) {
+            lyric->setProperty(Pid::COLOR, lyricColor);
+            lyric->setPropertyFlags(Pid::COLOR, PropertyFlags::UNSTYLED);
+            }
 
       const auto l = lyric.release();
       _numberedLyrics[lyricNo] = l;

mtest/musicxml/io/testLyricColor.xml

@@ -185,6 +185,10 @@
           <syllabic>single</syllabic>
           <text>blue.</text>
           </lyric>
+        <lyric number="2" color="#9541E8">
+          <syllabic>single</syllabic>
+          <text>purple.</text>
+          </lyric>
         </note>
       <barline location="right">
         <bar-style>light-heavy</bar-style>