[ui] MaterialIcons: add MaterialLabel

preset Component to create a Label with MaterialIcons font + optional tooltip

meshroom/ui/qml/MaterialIcons/MaterialLabel.qml

@@ -0,0 +1,24 @@
+import QtQuick 2.9
+import QtQuick.Controls 2.4
+
+
+/**
+ * MaterialLabel is a standard Label using MaterialIcons font.
+ * If ToolTip.text is set, it also shows up a tooltip when hovered.
+ */
+Label {
+    font.family: MaterialIcons.fontFamily
+    font.pointSize: 10
+    ToolTip.visible: toolTipLoader.active && toolTipLoader.item.containsMouse
+    ToolTip.delay: 1000
+
+    Loader {
+        id: toolTipLoader
+        anchors.fill: parent
+        active: parent.ToolTip.text
+        sourceComponent: MouseArea {
+            hoverEnabled: true
+            acceptedButtons: Qt.NoButton
+        }
+    }
+}

meshroom/ui/qml/MaterialIcons/qmldir

@@ -1,3 +1,4 @@
 module MaterialIcons
 singleton MaterialIcons 2.2 MaterialIcons.qml
 MaterialToolButton 2.2 MaterialToolButton.qml
+MaterialLabel 2.2 MaterialLabel.qml