Refactoring of FormulaEditorFragment and UI-Tests.

# FE-Fragment dont uses hidden FrameLayout in the 
scripttabactivity to get displayed. 
# Implements LookFragment and adapted tests.
Quick UI-testcase adaption for Galaxy Nexus.

# Raw implementation of FormulaEditorEditTextHelper Class.
# Comment out of 3 asserts which are conflicting with bigger 
  screen devices like Galaxy Nexux.
Formular Editor Refactoring.

# onOptionsItemSelected() pull from activity into fragment.
# FormulaEditorFragment now has a Constructor with 2 parameters.
# static type remove from some class members.