Nonexisting configuration file log changed and handled.
Minor name changes and fixes.

Becasue commandline options handled in constructor, error logs dont have access to message handler. Solved.
Additionaly when MainWindow destroyed, logs messages still logged properly.

_selectPort function changed to selectListedPort
unnecessary speed word removed from baudrate option
code optimization with portIndex

ApplicationName get from PROGRAM_NAME macro in CMakeLists.txt
Default settings name get from PROGRAM_NAME macro in CMakeLists.txt

added linear index buffer to support scaled x axis

this is also an important step towards "x data" support

plotting works, only demo is tested

switching readers when demo is enabled breaks demo

integrated almost all code to to use new Stream class, plotting doesn't work yet

building works, needs major cleanup

removed skip byte button from the port control panel

it's now in binary stream reader settings