bug#18480: 24.3.93; Popups "broken" with lines of different heights

[Sebastien Vauban]

Hello,

As demo'ed with this Org file, enabling completion mechanisms such as AC
or Company shows graphical glitches when themes have heights != 1.0.

--8<---------------cut here---------------start------------->8---
#+TITLE: ECM for popup
#+DATE: \today

* Context

When using a theme (such as Leuven theme) with different heights, the completion
popups are graphically broken.

* Title inserted here on purpose

The above title spreads away part of the nice popup window.

** Other subtitle

Foo.
--8<---------------cut here---------------end--------------->8---

Screenshots:

- http://screencast.com/t/oA0vurx3 for Auto-Complete
- http://screencast.com/t/OgP9vMBobjV for Company

Video:

See http://screencast.com/t/NNKTO7Nrivz:
- first enabling only AC mode
- then only Company mode

Best regards,
Seb