Textual tempo markers in adjacent bars are stacked

[Hendrik Fuß]

Hi folks,

I like the textual \tempo mark in LilyPond 2.12 and use it a lot. However, when 
preparing instrument parts, I often face the following problem:

\compressFullBarRests
\tempo "Allegro"
R1*6
\tempo "Rall."
R1*2
\tempo "A tempo"
R1*8

Because the multi-measure rest bars are too short, the three tempo marks are 
stacked on top of each other.

What would you suggest? Is there a way to automatically adjust the bar width to 
the width of the metronome mark?

cheers
Hendrik