fix(bar): set correct title bar height

[5im0n]

When you customize the SASS variables: $bar-footer-height, $bar-subheader-height, $bar-subfooter-height. If you set a title inside subheader, footer, and subfooter bar:

      <ion-header-bar class="bar-stable">
        <h1 class="title">Header</h1>
      </ion-header-bar>

      <ion-header-bar class="bar-subheader bar-energized">
        <h1 class="title">SubHeader</h1>
      </ion-header-bar>

      <ion-footer-bar class="bar-stable">
        <h1 class="title">Footer</h1>
      </ion-footer-bar>

      <ion-footer-bar class="bar-energized bar-subfooter">
        <h1 class="title">SubFooter</h1>
      </ion-footer-bar>

The title have a wrong height!

ScreenShot to illustrate the problem:

[5im0n]

Related issue #4966

[danbucholtz]

This looks good to me. Nice work, @5im0n. Thanks for contributing to Ionic!