Corrections to unit tests

Make the initial unit tests actually pass

Signed-off-by: Lakshman Anumolu <acrlakshman@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Information on writing test cases

This information is mainly from Tomaz on IRC with references added to Qt
documentation on the subject.

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Test cases for unit conversion

Added more test cases for unit conversion

Signed-off-by: Lakshman Anumolu <acrlakshman@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
New icons

- Replace the current text-based heart rate icon
- Replace the DC-reported ceiling icon

Signed-off-by: Luisa Pires <luisapiresdesign@gmail.com>
Signed-off-by: Willem Ferguson <willemferguson@zoology.up.ac.za>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Use Luisa's new icons

Move the heart rate graph icon up in the toolbox with the cluster of
buttons that control graphs

Signed-off-by: Willem Ferguson <willemferguson@zoology.up.ac.za>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>