changed the default size for the drumset panel

src/appshell/qml/NotationPage/NotationPage.qml

@@ -383,9 +383,15 @@ DockPage {
             objectName: pageModel.drumsetPanelName()
             title: qsTrc("appshell", "Drumset Tools")
 
-            height: 100
-            minimumHeight: 100
-            maximumHeight: 200
+            height: 64
+            minimumHeight: 64
+            maximumHeight: 64
+
+            //! NOTE: hidden by default
+            visible: false
+
+            //! NOTE: the user cannot close or undock this panel
+            persistent: true
 
             location: Location.Bottom
 

src/palette/qml/MuseScore/Palette/DrumsetPanel.qml

@@ -29,10 +29,10 @@ import MuseScore.Palette 1.0
 Item {
     RowLayout {
         anchors.fill: parent
-        anchors.leftMargin: 26
-        anchors.rightMargin: 26
+        anchors.leftMargin: 12
+        anchors.rightMargin: 8
 
-        spacing: 26
+        spacing: 12
 
         Column {
             Layout.alignment: Qt.AlignVCenter