Montgomery County lawyer David Manilla has been given an allowance of $10,000 a month to pay his bills. Other than that, all of his assets are in an escrow account under Bucks County Court supervision.  That’s the latest development in a wrongful death civil lawsuit filed by Theresa Groh, the widow of 52-year-old hunter Barry Groh of Quakertown.  Manilla shot and killed him in late November as he dragged a deer along the Tohickon Creek in Richland Township.  The 49-year-old Manilla, of Worcester, is also charged with involuntary manslaughter and other criminal offenses.  His trial will probably start in May or June.