BRANCH 4.1:   handled failed icon generation better to let a file check-in to go through   added docx and xlsx to the list of file extensions that skip icon generation
BRANCH 4.1:
  handled failed icon generation better to let a file check-in to go through
  added docx and xlsx to the list of file extensions that skip icon generation

mwx1993/TACTIC,talha81/TACTIC-DEV,sadanandb/pmt,diegocortassa/TACTIC,talha81/TACTIC-DEV,southpawtech/TACTIC-DEV,diegocortassa/TACTIC,hsuchie4/TACTIC,mwx1993/TACTIC,southpawtech/TACTIC-DEV,CeltonMcGrath/TACTIC,Southpaw-TACTIC/TACTIC,diegocortassa/TACTIC,mwx1993/TACTIC,Southpaw-TACTIC/TACTIC,hsuchie4/TACTIC,CeltonMcGrath/TACTIC,talha81/TACTIC-DEV,southpawtech/TACTIC-DEV,Southpaw-TACTIC/TACTIC,Southpaw-TACTIC/TACTIC,sadanandb/pmt,diegocortassa/TACTIC,southpawtech/TACTIC-DEV,CeltonMcGrath/TACTIC,sadanandb/pmt,talha81/TACTIC-DEV,southpawtech/TACTIC-DEV,sadanandb/pmt,hsuchie4/TACTIC,southpawtech/TACTIC-DEV,mwx1993/TACTIC,talha81/TACTIC-DEV,Southpaw-TACTIC/TACTIC,talha81/TACTIC-DEV,hsuchie4/TACTIC,mwx1993/TACTIC,mwx1993/TACTIC,sadanandb/pmt,diegocortassa/TACTIC,hsuchie4/TACTIC,CeltonMcGrath/TACTIC,CeltonMcGrath/TACTIC,CeltonMcGrath/TACTIC,hsuchie4/TACTIC,diegocortassa/TACTIC,Southpaw-TACTIC/TACTIC