[ #13801 ] Remove caps from file

src/CMakeLists.txt

src/account.cpp

src/account.h

src/accountlist.cpp

src/accountlist.h

src/audiocodecmodel.cpp

src/audiocodecmodel.h

src/call.cpp

src/call.h

src/callmodel.cpp

src/callmodel.h

src/callmodel.hpp

src/contact.cpp

src/contact.h

src/contactbackend.cpp

src/contactbackend.h

src/credentialmodel.cpp

src/credentialmodel.h

src/historymodel.cpp

src/historymodel.h