avoid long lines

It is a coding style violation.
log exceptions

Don't just throw away the useful error messages!
also log previous exception message when available
Updated slovak translations for 2.3 branch
Updated czech translations
Merge pull request #2446 from greg0ire/log_previous_exceptions

[2.3] Log previous exceptions
Updated stylesheets and javascripts configuration
update chinese translations
Merge pull request #2485 from scourgen/2.3

update chinese translations
Added missing exclamation mark that is displayed on tab with error
Merge pull request #2488 from pulzarraider/fix_missing_exclamation

Added missing exclamation mark that is displayed on tab with error
Update conditional_validation.rst

Since maxLength(), and minLength() are deprecated in symphony 2.3, the assertMinLength(), and assertMaxLength() would cause errors
Merge pull request #2515 from oopsFrogs/patch-2

Update conditional_validation.rst