Fixed PNA compiler error

There was some strange character (here not visible) at the beginning of the file: dlgTextEntry_Keyboard.cpp
Causing this error (when compiling on a native Linux environment):

  CXX     Bin/PNA/Dialogs/dlgTextEntry_Keyboard.o
Common/Source/Dialogs/dlgTextEntry_Keyboard.cpp:1: error: stray '\357' in program
Common/Source/Dialogs/dlgTextEntry_Keyboard.cpp:1: error: stray '\273' in program
Common/Source/Dialogs/dlgTextEntry_Keyboard.cpp:1: error: stray '\277' in program
make: *** [Bin/PNA/Dialogs/dlgTextEntry_Keyboard.o] Error 1