[Pharo-project] Ann: OmniBrowser stable for 1.4 with RB

I've updated the configuration of OmniBrowser so It can load with the last version of RB. (ConfigurationOfOmniBrowser project version: #stable) load: #( 'Dev' 'Dev Tests'). BTW, I've fixed a deprecation on RB (#withBlanksTrimmed -> #trimBoth) and posted it into PharoTaskForces, since I don't have grants to write into PharoRB. All tests are green and It's working fine :). This version is freezed for anyone who wants to use it. I'll be working to update OB to Lukas's latest chanes from now on. Bye! Guille