Merge branch 'master' of https://github.com/SeisComP/common

…isComP/common

…ing mode.

…itudes.

- Zoom in/out announces level (Ctrl+Left/Right)
- Amplitude up/down announced (Ctrl+Up/Down)
- Maximize amplitudes announced (S key)
- Scale reset announced (W key)
- Default view restored announced (Ctrl+N)
- Show all/single component toggled announced (T key)

- Sort by distance/azimuth/residual/alphabetically announced
- Align on origin time / P arrivals / S arrivals announced
- Show/hide theoretical arrivals, unassociated picks, spectrogram announced
- Reset pick announced

- Data loaded: loaded N origins, M focal mechanisms
- Journal entry success/failure
- Event type and certainty combo changes
- Tree selection: origin ID+time, FM ID, magnitude type+value
- Fix/release origin, magnitude, focal mechanism
- Preferred origin/magnitude/FM changed

- Mag type tab switches: 'Showing MLv magnitude'
- Recalculate result: 'Recalculated MLv 5.2 ± 0.3 with 12 stations'
- Channel activate/deactivate with counts
- Station checkbox toggles: included/excluded from magnitude
- Diagram hover/click: station and value info
- Evaluation status changes
- Tab close: magnitude removed
- Magnitude created announcement
- Suppression flag for programmatic updates

AmplitudeView:
- Component selection, station selection, filter changes
- Amplitude create/set/confirm/delete/recalculate
- Amplitude commit with count, trace values at cursor

CalculateAmplitudes:
- Computation config on accept, filter state/type changes

- Audio sonification with WaveformAudio: Ctrl+Shift+A toggle,
  Ctrl+Space play full trace at 160x, Ctrl+Shift+Space stop
- Interactive cursor-tracking audio: 15s window at 80x speed
  on cursor stop (300ms debounce), also on scroll/move
- Keyboard context menu via Menu key for markers
- Screen reader announcements from previous commit

AmplitudeView (QMainWindow): uses statusBar()->showMessage() for
visual feedback and QAccessibleAnnouncementEvent for screen readers.
OriginLocatorView, EventEdit, MagnitudeView, CalculateAmplitudes
(QWidget): use QAccessibleAnnouncementEvent + SEISCOMP_DEBUG log.
All were previously no-op stubs.

announceToScreenReader no longer calls statusBar()->showMessage().
Screen reader announcements are silent to sighted users, using only
QAccessibleAnnouncementEvent. Direct statusBar calls for audio
sonification and error states are preserved as legitimate UI feedback.

Commit dialog: announces on open and accept with evaluation status,
event type, and phase count.
SelectStation: filter results count, station selection in table.
PickerSettings: slider release values (pre/post offset, amplitude offsets),
settings saved confirmation.
OriginDialog: origin coordinates on accept.

- Set QToolButton::MenuButtonPopup mode on btnCommit so the
  dropdown arrow is focusable and accessible via keyboard
- Add Ctrl+Shift+Return shortcut to open commit options dialog directly
- Update tooltip to inform users about both access methods

- Space/Enter on commit button commits immediately (original behavior)
- Ctrl+Return opens 'With additional options...' commit dialog
- MenuButtonPopup mode gives dropdown arrow for mouse users too

- Enter/Space: commit directly
- Ctrl+Enter: show the commit popup menu
- Ctrl+Shift+Enter: open 'With additional options...' dialog directly