Add a 'list' option for the CLI

This commit addresses Issue #448 by adding a command line option that allows the listing of all the Apps reported by the remote host as a CSV.

app/gui/CliListAppsSegue.qml

@@ -0,0 +1,57 @@
+import QtQuick 2.0
+import QtQuick.Controls 2.2
+
+import ComputerManager 1.0
+import Session 1.0
+
+Item {
+    function onSearchingComputer() {
+        stageLabel.text = qsTr("Establishing connection to PC...")
+    }
+
+    function onSearchingApps() {
+        stageLabel.text = qsTr("Searching for Apps...")
+    }
+
+    function onFailure(message) {
+        errorDialog.text = message
+        errorDialog.open()
+    }
+
+    StackView.onActivated: {
+        if (!launcher.isExecuted()) {
+            toolBar.visible = false
+            launcher.searchingComputer.connect(onSearchingComputer)
+            launcher.searchingComputer.connect(onSearchingApps)
+            launcher.failed.connect(onFailure)
+            launcher.execute(ComputerManager)
+        }
+    }
+
+    Row {
+        anchors.centerIn: parent
+        spacing: 5
+
+        BusyIndicator {
+            id: stageSpinner
+        }
+
+        Label {
+            id: stageLabel
+            height: stageSpinner.height
+            text: stageText
+            font.pointSize: 20
+            verticalAlignment: Text.AlignVCenter
+
+            wrapMode: Text.Wrap
+        }
+    }
+
+    ErrorMessageDialog {
+        id: errorDialog
+
+        onClosed: {
+            Qt.quit()
+        }
+    }
+}