osd: update the default window switcher layout

osd: update the default window switcher layout

The default window switcher layout is updated from:

  <windowSwitcher>
    <fields>
      <field content="type" width="25%" />
      <field content="trimmed_identifier" width="25%" />
      <field content="title" width="50%" />
    </fields>
  </windowSwitcher>

to:

  <windowSwitcher>
    <fields>
      <field content="icon" width="5%" />
      <field content="desktop_entry_name" width="30%" />
      <field content="title" width="65%" />
    </fields>
  </windowSwitcher>

Only desktop entry name and title are shown when libsfdo is not linked.