Each graph is created before the applications begins, this means all the data analyses is already done and moving around the app is super fast. However this does mean a longer load time.

Things to do:
-Axis selection in weird position before graph is displayed, put back in normal place
-Fix colormap function, I couldn't get it to work so all the data is the same colour... sorry!
-Add classes for other types of graphs we want, not sure exactly what data we want to see (discuss)
-I just noticed that there's a problem returning back to the first graph after looking at the second, I'll have a look later

Kalman filter now entirely in separate file. 
Goal is to use this file just for the display while different files handle the data.

Same code as previous kalman filter but reformatted to be called by the main file. To be put in the same directory as display file.