PR: Add the option to hide or show the weather data in the tool to vi…

…sualize the water levels dynamically and improve the look of the plot (#207)

* Add an icon show_meteo

* Remove mpl font setup for this tool

* Rework the method to draw the weather

* Code style

* Code style

* Code style

* Change linestyle of ETP

* Add a toolbar btn to hide/show weather

* Code cleaning and style

* Connect btn directly to slot

* Code style

* Move the code to set yaxis range for meteo

* Make precip bin width a class attribute

* Revert to previous colors for the ptot

* Change the color again