tps scrollbar, label's position, color, height for each

Closes #88

See merge request !136

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

 change dir_names to list_of_dir, current directory to gps dialog because there can be more than one folder loaded; change from read_from_file_list to get_file_list(); remove try catch in get_file_list() because it is catch at the call of this function

processing.py: modify load_data() to load more than one dir; modify detect_data_type due to bug when more than one data_types are detected

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