TODO TTCalc
===========

* increase the input edit
* when the program should be run as the maximalized window, the window is only
  resizing horizontly
* doesn't set 'always on top' if it was in the configuration file
* add the button 'error' which shows us where is incorrect character (in input edit)
* add the test when program is being starded which checks if the coordinates of the
  main window actually pointing
  at the valid area (for example when someone take his configuration file into a
  new computer)
* add some physical constants
* make the help 
* the focus (from tab key) doesn't go from tabs into their controls
* when compiling under Cygwin the program has a problem with line-ends in
  the configuration file (/r/n)