Fix bug Event DS not plotted

Closes #111 and #105

See merge request !121

Fix gps lk unlk plotting - coloring, positioning label

Closes #109

See merge request !126

Fix DSP Clock Diff channel not display

See merge request !129

report and skip if can't read a file in RT130

Closes #114

See merge request !130

Fast MSEED read

See merge request !132

fix bug no ruler showup when no TPS data

Closes #113

See merge request !125

Fix previous plot still showing when re-plotting after zooming in

See merge request !115

separate  data at gaps/overlaps

Closes #100

See merge request !119

Showing gap bar in waveform widget

Closes #91

See merge request !117

round min_y, max_y to 2 decimal places

Closes #97

See merge request !116

Replot for TPS to apply colorange inside TPS only

Closes #85

See merge request !113

change MP? to MassPos? in DB. It's been changed before. But for some reason, it went back to MP?

See merge request !114

add clear function to PlottingWidget and call it for each plotting widget used

Closes #77 and #55

See merge request !104

make SOHWidget to use processor like WaveformWidget

See merge request !109

Show time label on top of ruler

Closes #71

See merge request !96

Fix RT130 plot failing

Closes #70

See merge request !108

fix bug calculate find_tps_tm when the end time fall into the last 5 minute of a day

Closes #81

See merge request !112

This reverts merge request !102

fix bug calculate find_tps_tm when the end time fall into the last 5 minute of a day

Closes #81

See merge request !102