add tooltip for channel edit button
alter menu name for processor automation and hide extra separator in menu when not needed
allow double click on radio buttons in ambiguous file dialog to finish dialog
if a filesource is supposed to be new, don't waste time looking for it. if it has its _origin member set, search for that, not its name (affects embedded files)
vtl: update ffmpeg parameters and output-parsing
vtl: minor UI dialog tweaks
fix up some confusion with filesources' _origin and _file_is_new members. if _origin is set, it means that the file is "external" to the session (aka "embedded") and for some purposes this is more significant than _file_is_new. rename SourceFactory::createReadable() to ::createExternal() to more clearly indicate its purpose; remove never-supplied "origin" argument from SourceFactor::createWritable(). Fixes problems caused by 864ce8f0
Merge branch 'master' of git.ardour.org:ardour/ardour
vtl: open-video dialog tweaks

* show Timecode in/out
* fix text alignment
* parse aspect-ratio
* reset seek-slider on file selection
* make fps label translatable