Bugfix, the pressure and temperature window were drawing to the wrong figure with multiple figures open.

Integrated the empiric_offset and empiric_drift parameter of the float, Changed copy offsets layout.

The restore view button has been implemented in a custom function for temperature, pressure and toa window.

Pick point and polygon methods are now equal to time of arrival in pressure and temperature windows.

Changed label from "Point" to "Point(s)" to clearify that it is possible to select multiple points at once.

/ Changed background color of axes to white
/ Changed colormap to gray skipping the first 44 steps of 300

+ Added soundsources/colorregister package that is used to assign a color
  to a specific sound source.
+ Added an edit field to the upper and lower boundary adjustment section
+ Added a histogram plot of the TOAs
/ The soundsource color legend shows only the color of an applied sound
  source, white otherwise.

Bugfix:
  When soundsource has been applied, the zoom function was not functioning
  anymore.

Toa table:
  It is now possible to select the duplicates in the toa table, and the
  the plot will zoom to it.

Main window additions:
  - The "Reload artoa.ini" button has been introduced.

TOA window modifications:
  - The colormap of TOA now matches the nemo2profile colormap.
  - The colors of the sound sources can now be configured in artoa.ini.
  - The soundsources now are displayed as ring and in the configured color.
  - The TOA descriptions are now displayed in every third occurrence.
  - A legend with colors for the soundsources has been added to the window.

It is now possible to select TOAs and shift them by a given value.