mobile: make list action buttons appear again

Dive list: on holding an item, the delete button
was not showing the icon.

Show GPS fixes: when swiping an item icons were
not being shown.

Partial for bug #1267

Signed-off-by: Murillo Bernardes <mfbernardes@gmail.com>

mobile-widgets/qml/DiveList.qml

@@ -211,6 +211,8 @@ Kirigami.ScrollablePage {
 							verticalCenter: parent.verticalCenter
 						}
 						source: ":/icons/trash-empty"
+						width: Kirigami.Units.iconSizes.smallMedium
+						height: width
 					}
 					MouseArea {
 						anchors.fill: parent

mobile-widgets/qml/GpsList.qml

@@ -74,7 +74,7 @@ Kirigami.ScrollablePage {
 			actions: [
 				Kirigami.Action {
 					icon {
-						name: "trash-empty"
+						name: ":/icons/trash-empty"
 					}
 					onTriggered: {
 						print("delete this!")
@@ -83,7 +83,7 @@ Kirigami.ScrollablePage {
 				},
 				Kirigami.Action {
 					icon {
-						name: "gps"
+						name: ":/icons/gps"
 					}
 					onTriggered: {
 						showMap()