Also removes parallel implementation in favour of using the
normal one (with a new wxGauge-backed PROGRESS_REPORTER).
Fixes: lp:1764196
* https://bugs.launchpad.net/kicad/+bug/1764196
Also update the rest of the symbol-chooser usage to current
specs, including examining the timestamp to see if the list
needs loading at all.
Partial fix to: lp:1760936
* https://bugs.launchpad.net/kicad/+bug/1760936
While we already cache the loaded footprint files, parsing said files
into the list is also time-intensive. Since the FOOTPRINT_LIST is
already hash-stamped against the current timestamps of the files that
make up the list, sharing a single copy of the list is quite
straight-forward.
- DIALOG_CHOOSE_COMPONENT has footprint select widget
- FOOTPRINT_SELECT_WIDGET
- FOOTPRINT_CHOICE widget (customized wxComboCtrl)
- FOOTPRINT_FILTER class
- FOOTPRINT_INFO rework:
- FOOTPRINT_ASYNC_LOADER to load without freezing UI
- Rewrite loader threads as queue-driven thread pool
- Make FOOTPRINT_INFO available via kiway
- FP_LIB_TABLE::PrefetchLib
- Access to global fp-lib-table via kiway
- SYNC_QUEUE threadsafe queue template
- Remove KICAD_FOOTPRINT_SELECTOR build option