[gui] Show origin quality grade in scolv and scesv with tooltip breakdown

[comoglu]

Summary

Shows the origin quality grade (written by scoriginquality) by default in
both the scolv Location tab and the scesv hypocenter panel, with no
configuration required.

Changes

eventsummaryview (scesv hypocenter panel):

• Default comment ID changed to "quality", label to "Quality:"
• Both remain overridable via display.origin.comment.id and
  display.origin.comment.label

originlocatorview (scolv Location tab):

• Default comment ID changed to "quality", label to "Quality:"
• Both remain overridable via olv.display.origin.comment.id and
  display.origin.comment.label
• Static tooltip on the "Quality:" label shows the full threshold table

Tooltip support (both views):

• scoriginquality stores grade + breakdown in a single comment using \n
  as separator (grade letter on line 1, one parameter per line after)
• The display code splits on the first \n: label shows the grade letter,
  setToolTip() shows the full per-parameter breakdown on hover

Example tooltip on hover over the grade value:

Az. Gap: 76.3° → A
Sec. Gap: 115.1° → B
RMS: 0.937 s → D
Stations: 12 → A
Min. Dist: 18.2° → A
Horiz. Unc.: 7.4 km → B

Related PRs

• Module that computes and writes the grade: comoglu/main:feature/scoriginquality ([python] Add scoriginquality: automatic A/B/C/D origin quality grading main#117)

Test plan

• Start scoriginquality + scolv; locate an event; confirm "Quality: B" (or similar) appears on Location tab without any config
• Hover over the grade value — confirm per-parameter breakdown tooltip
• Hover over "Quality:" label — confirm threshold table tooltip
• Start scesv; confirm grade appears in hypocenter panel
• Hover grade in scesv — confirm breakdown tooltip
• Set display.origin.comment.id = myCustomID — confirm custom comment still displays