Description of problem:
In Variable history modal in (accessible in Process Instance perspective, in Process variables > Process variable history) the 'value' and 'previous value' fields are always truncated, no matter how you resize the window.

This will make problems with longer variable values not being readable. Although there is 'title' attibute showing the full valu when you mouse over, this attibute is ONLY available for the first line in the history table. In the remaining lines it is not present, so user can never see the previous values fully.

See video attached - notice, that previous variable values are always contracted, even when window resized. It would be OK, if at least mousing over the variable value would show the full value (via title attribute of the element), but that attribute is only available in the first line of the table, as you can see in the video.

Version-Release number of selected component (if applicable):
BPMS 6.0.0 CR1 + firefox 24 (most likely in other browsers as well)

How reproducible:
Always

Steps to Reproduce:
1. Try running some process with variables, that can have long values
2. In Process Management > Process Instances > Instance Details > views > process variables click 'process variable history' (clock icon) for some variable with long value

Actual results:
value is truncated
title attribute with the full value is only present on the first line.

Expected results:
Either expand the variable value when table column is resized
OR
make title attribute with full variable value available in all the history table lines