accessibility: make button readable by screen readers

GitLab: #601
Change-Id: Ic60d035776c5a3ae9f1e6ee93b283c7c422d39f5

src/commoncomponents/MaterialButton.qml

@@ -58,6 +58,10 @@ Button {
 
     focusPolicy: Qt.TabFocus
 
+    Accessible.role: Accessible.Button
+    Accessible.name: root.text
+    Accessible.description: toolTipText
+
     MaterialToolTip {
         id: toolTip
 

src/commoncomponents/PushButton.qml

@@ -79,6 +79,10 @@ AbstractButton {
     hoverEnabled: true
     focusPolicy: Qt.TabFocus
 
+    Accessible.role: Accessible.Button
+    Accessible.name: buttonText
+    Accessible.description: toolTipText
+
     MaterialToolTip {
         id: toolTip
 

src/mainview/components/SmartListItemDelegate.qml

@@ -142,6 +142,10 @@ ItemDelegate {
                 }
             }
         }
+
+        Accessible.role: Accessible.Button
+        Accessible.name: Title === undefined? "" : Title
+        Accessible.description: LastInteraction === undefined? "" : LastInteraction
     }
 
     background: Rectangle {

src/settingsview/components/ToggleSwitch.qml

@@ -66,6 +66,10 @@ RowLayout {
         ToolTip.visible: hovered && (tooltipText.length > 0)
         ToolTip.text: tooltipText
 
+        Accessible.role: Accessible.Button
+        Accessible.name: root.labelText
+        Accessible.description: root.tooltipText
+
         onToggled: {
             switchToggled()
         }