Improve timeline AppImage font

src/core.cpp

@@ -88,7 +88,7 @@ void Core::build(bool isAppImage, const QString &MltPath)
     qRegisterMetaType<QVector<int>>();
     qRegisterMetaType<QDomElement>("QDomElement");
     qRegisterMetaType<requestClipInfo>("requestClipInfo");
-    
+
     if (isAppImage) {
         QString appPath = qApp->applicationDirPath();
         KdenliveSettings::setFfmpegpath(QDir::cleanPath(appPath + QStringLiteral("/ffmpeg")));

src/timeline2/view/qml/TrackHead.qml

@@ -222,14 +222,8 @@ Rectangle {
             background: Rectangle {
                 color: trackLed.bgColor
             }
-            FontMetrics {
-                id: textMetricsLed
-                font: miniFont
-            }
-            width: (Math.ceil(textMetricsLed.averageCharacterWidth * trackLed.text.length * 1.2))
+            width: fontMetrics.boundingRect("M").width * trackLed.text.length
             y: 1
-            leftPadding:0
-            rightPadding:0
             verticalAlignment: Text.AlignVCenter
             horizontalAlignment: Text.AlignHCenter
             MouseArea {

src/timeline2/view/timelinewidget.cpp

@@ -164,7 +164,10 @@ void TimelineWidget::setModel(const std::shared_ptr<TimelineItemModel> &model, M
     rootContext()->setContextProperty("audiorec", pCore->getAudioDevice());
     rootContext()->setContextProperty("guidesModel", pCore->projectManager()->current()->getGuideModel().get());
     rootContext()->setContextProperty("clipboard", new ClipboardProxy(this));
-    rootContext()->setContextProperty("miniFont", QFontDatabase::systemFont(QFontDatabase::SmallestReadableFont));
+    QFont ft = QFontDatabase::systemFont(QFontDatabase::GeneralFont);
+    ft.setPixelSize(QFontDatabase::systemFont(QFontDatabase::SmallestReadableFont).pixelSize());
+    setFont(ft);
+    rootContext()->setContextProperty("miniFont", font());
     const QStringList effs = sortedItems(KdenliveSettings::favorite_effects(), false).values();
     const QStringList trans = sortedItems(KdenliveSettings::favorite_transitions(), true).values();