Checking if the diff is '>' instead of '>=' will always fail if
tolerance=0, even if the colours are identical. This will cause the line
to get a startime greter than its end time, which is not desireable.
Rounding errors and limits of floating type precision might still affect
the comparison. An additional sanity check before calculation is added
to ensure the selected position and colour match within tolerance.
This allows us to refactor the search code to never check the starting
frame and guanrantees valid timings with start<end even with
rounding errors.
No other tooltips end with points, even if they're a sentence.These
ones aren't even sentences.
Also updates all *.po files accordingly, with an hacked in
POT-Creation-Date due to issues with make_pot.sh.
odrling