Add placeholder tool buttons in arrangement panel

Author: CrSjimo

src/plugins/coreplugin/qml/panels/ArrangementPanel.qml

@@ -9,5 +9,59 @@ import SVSCraft.UIComponents
 import DiffScope.UIShell
 
 ActionDockingPane {
-
+    header: RowLayout {
+        anchors.fill: parent
+        spacing: 4
+        ToolButton {
+            icon.source: "qrc:/diffscope/coreplugin/icons/AddCircle16Filled.svg"
+            text: qsTr("Add Track")
+        }
+        Rectangle {
+            width: 1
+            Layout.fillHeight: true
+            Layout.topMargin: 4
+            Layout.bottomMargin: 4
+            color: Theme.borderColor
+        }
+        ButtonGroup {
+            id: editModeButtonGroup
+            exclusive: true
+        }
+        ToolButton {
+            icon.source: "qrc:/diffscope/coreplugin/icons/Cursor16Filled.svg"
+            text: qsTr("Pointer")
+            display: AbstractButton.IconOnly
+            checkable: true
+            checked: true
+            ButtonGroup.group: editModeButtonGroup
+        }
+        ToolButton {
+            icon.source: "qrc:/diffscope/coreplugin/icons/Edit16Filled.svg"
+            text: qsTr("Pen")
+            display: AbstractButton.IconOnly
+            checkable: true
+            ButtonGroup.group: editModeButtonGroup
+        }
+        ToolButton {
+            icon.source: "qrc:/diffscope/coreplugin/icons/Cut16Filled.svg"
+            text: qsTr("Scissor")
+            display: AbstractButton.IconOnly
+            checkable: true
+            ButtonGroup.group: editModeButtonGroup
+        }
+        Item {
+            Layout.fillWidth: true
+        }
+        ToolButton {
+            text: qsTr("Toggle Tempo Track")
+            display: AbstractButton.IconOnly
+            checkable: true
+        }
+        ToolButton {
+            icon.source: "qrc:/diffscope/coreplugin/icons/Tag16Filled"
+            text: qsTr("Toggle Tag Track")
+            display: AbstractButton.IconOnly
+            checkable: true
+        }
+    }
 }