The Project Explorer previously only had an old Pre-Cache submenu that
required choosing a sequence. Replace it with the same Proxy menu that
the timeline uses:
- Generate Proxy: batch-generates proxies for all selected footage items
that have an enabled video stream, using ProxyManager and the current
proxy settings.
- Use Proxy: checkable toggle that enables/disables proxy playback for the
selected footage.
- Reveal Proxy / Delete Proxy: consistent with the timeline context menu.
Also make Footage::SaveCustom() write the <proxy> element whenever
proxy_enabled_ is true, even if proxy_path_ is empty, and load it back
in LoadCustom(). This preserves the user's Use Proxy preference across
project saves so it is restored on the next open.
Translation files updated with lupdate; zh_CN and zh_TW translations for
the new Project Explorer strings (and the matching timeline strings) are
filled in.
Run lupdate to pull the latest source strings (including new proxy
settings/menu text) into all .ts files. Translations for the new strings
are marked unfinished and can be filled in by translators.
Scope issues seem to cause problems where the main compile step can't find the translation step, so even though it's messier, this code is now in the parent scope.
Fixes#1595
* .arg() doesn't handle plurals, replace %1 with %n and pass number to tr(), but only if there is an accompanying word for that we want singular/plural translations and only for whole numbers.
* Qt's translation methods only accept integers and we don't know what grammatical number form would be correct for floating-point numbers in different languages anyway.
* Add optional 2nd argument to SliderBase::SetFormat() to activate deferred plural handling:
SetFormat(QT_TRANSLATE_N_NOOP("olive::SliderBase", "%n unit(s)"), true)
* Generate en_US.ts with lupdate's -pluralonly option. Only source strings that require plural handling need to be translated (as long as the source language is American English).