Added possibility to export to CSV
--> /home/nemo/Documents/valuelogger.csv

Plot can be zoomed and moved around.
Pinch vertically to zoom values
Pinch horizontally to zoom date
Single touch moves
Plot scales from true min to max, not 0 (or less) to max

• Fix plot min/max truncation issue #1
• Add swedish translation #2
• Add some coveractions #3
• Selected plot switch states now saved #4