Implement a dialog to plot and export GPS data

See merge request !53

Extract GPS data for Q330

See merge request !56

remove outer loop in sortData() because only need to take care of the data in the set_key

See merge request !51

Disable shiftclick on TimePowerSquareWidget

See merge request !50

User can raise an available form in Forms Menu

See merge request !49

Bugs related to MR55

See merge request !58

PEP8 compliance model code

See merge request !55

PEP8 compliance controller code

See merge request !54

Multi-thread waveform plot

See merge request !47

Add type hint to controller code

See merge request !31

Add type hint to model code

See merge request !36

Fix bug where content of ASCII files are read twice.

See merge request !52

Fix bug where content of ASCII files are read twice.

# Conflicts:
#	sohstationviewer/controller/util.py
#	sohstationviewer/view/plotting/time_power_squared_dialog.py

Makes database code pep8 compliant

See merge request !20

Display and search on help documentation

See merge request !39

Move data loading to a separate thread

See merge request !46

Create mechanism to load data in a separate thread.

Implement ability to stop loading data.

Add documentation to note that loadData and
DataTypeModel.create_data_object are deprecated.

Implement deleting temp data folder on start

Closes #41

See merge request !48

SOH message dialog

See merge request !45

add logIdx to the downsample function

See merge request !38

Save current working directory to DB

See merge request !43