Implement session sign out (password auth only)

src/gui/Pages/AccountSettings/Sessions.qml

@@ -53,16 +53,32 @@ HColumnPage {
     }
 
     function deleteDevices(...indice) {
-        const deviceIds = []
+        if (indice.length === 1 && indice[0] === 0) {
+            utils.makePopup("Popups/SignOutPopup.qml", { userId: page.userId })
+            return
+        }
 
-        for (const i of indice.sort())
+        const deviceIds     = []
+        let deleteOwnDevice = false
+
+        for (const i of indice.sort()) {
+            i === 0 ?
+            deleteOwnDevice = true :
             deviceIds.push(deviceList.model.get(i).id)
+        }
 
         utils.makePopup(
-            "Popups/AuthentificationPopup.qml",
+            "Popups/DeleteDevicesPopup.qml",
             {
                 userId: page.userId,
                 deviceIds,
+                deletedCallback: () => {
+                    deleteOwnDevice ?
+                    utils.makePopup(
+                        "Popups/SignOutPopup.qml", { userId: page.userId },
+                    ) :
+                    page.loadDevices()
+                },
             },
         )
     }

src/gui/Popups/AuthentificationPopup.qml

@@ -1,25 +0,0 @@
-// SPDX-License-Identifier: LGPL-3.0-or-later
-
-import QtQuick 2.12
-import "../Base"
-import "../Base/ButtonLayout"
-
-HFlickableColumnPopup {
-    id: popup
-
-
-    property string userId
-    property string deviceIds
-
-
-    page.footer: ButtonLayout {
-        CancelButton {
-            id: cancelButton
-            onClicked: popup.close()
-        }
-    }
-
-    onOpened: cancelButton.forceActiveFocus()
-
-    SummaryLabel { text: qsTr("Not implemented yet") }
-}

src/gui/Popups/DeleteDevicesPopup.qml

@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+import QtQuick 2.12
+import "../Base"
+import "../Base/ButtonLayout"
+
+PasswordPopup {
+    id: popup
+
+
+    property string userId
+    property var deviceIds  // array
+    property var deletedCallback: null
+
+
+    function verifyPassword(pass, callback) {
+        py.callClientCoro(
+            userId,
+            "delete_devices_with_password",
+            [deviceIds, pass],
+            () => callback(true),
+            (type, args) => {
+                callback(
+                    type === "MatrixUnauthorized" ?
+                    false :
+                    qsTr("Unknown error: %1 - %2").arg(type).arg(args)
+                )
+            },
+        )
+    }
+
+    summary.text:
+        qsTr("Enter your account's password to continue:")
+
+
+    validateButton.text: qsTr("Sign out")
+    validateButton.icon.name: "sign-out"
+
+    onClosed: if (acceptedPassword && deletedCallback) deletedCallback()
+}