[gnome-shell] unlockDialog: Set accessible name of icon-only buttons

[Florian Müllner <fmuellner src gnome org>]

commit d62391c8f129b9b9808d6e51cc690004819b0496
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Feb 19 18:06:38 2020 +0100

    unlockDialog: Set accessible name of icon-only buttons
    
    We turned both the auth prompt's cancel button and the switch user
    button into icon buttons now, which means they are completely cryptic
    when using a screen reader.
    
    Just use the previously used labels as accessible names, which has the
    nice side effect of lowering the impact of the string freeze break.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/issues/2210

 js/gdm/authPrompt.js  | 1 +
 js/ui/unlockDialog.js | 1 +
 2 files changed, 2 insertions(+)
---
diff --git a/js/gdm/authPrompt.js b/js/gdm/authPrompt.js
index bab6d5deee..4bcd028aee 100644
--- a/js/gdm/authPrompt.js
+++ b/js/gdm/authPrompt.js
@@ -132,6 +132,7 @@ var AuthPrompt = GObject.registerClass({
 
         this.cancelButton = new St.Button({
             style_class: 'modal-dialog-button button cancel-button',
+            accessible_name: _('Cancel'),
             button_mask: St.ButtonMask.ONE | St.ButtonMask.THREE,
             reactive: this._hasCancelButton,
             can_focus: this._hasCancelButton,
diff --git a/js/ui/unlockDialog.js b/js/ui/unlockDialog.js
index f894709ffc..14bd972d6a 100644
--- a/js/ui/unlockDialog.js
+++ b/js/ui/unlockDialog.js
@@ -555,6 +555,7 @@ var UnlockDialog = GObject.registerClass({
         // Switch User button
         this._otherUserButton = new St.Button({
             style_class: 'modal-dialog-button button switch-user-button',
+            accessible_name: _('Log in as another user'),
             can_focus: true,
             reactive: true,
             x_align: Clutter.ActorAlign.END,