The condition type was able to miss transition starts of very fast
conditions (e.g. Cut) when the selection "Any transition" was made.
In that case no signal handler was installed (as the condition type
might change) and only the transition scenes were compared at the time
of the condition check.
If that moment where the transition scenes differ was missed no
transition start was recognized.
Additionally, the "Transitioning to" and "Transitioning from" checks
faced a similar issue, if the scene transition was happening so fast,
that the condition check was not performed during the time of the
transition.
The "core" macro conditions and actions have been extracted out to the
"base" plugin.
The library now mostly contains functionality which is required across
all plugins and (e.g. definitions for macro segments).
The goal is to reduce the complexity and cross-dependencies and group
the source files in a better way.
This should relsove the "library limit of 65535 objects exceeded" build
issue occuring in some Windows build environments.
