Add an icon for "restore" action

Summary:
Before:
{F6469103}

After:
{F6469104}

Test Plan:
1. Go to Trash

2. Right click any item.

Reviewers: ngraham

Reviewed By: ngraham

Subscribers: kfm-devel

Tags: #dolphin

Differential Revision: https://phabricator.kde.org/D17490