Depending on what order the subgraphs are processed in, it's
possible to hit a case where the parent sheet renames a bus
member before the bus neighbor renaming logic runs. In this
case, we don't want to apply the bus neighbor logic as it will
break connectivity to the parent sheet if that bus was not
also renamed (for example, if the hier ports only make net
connections and not bus connections)
Fixes https://gitlab.com/kicad/code/kicad/-/issues/6887
Previously disambiguation was looking for exact matches,
but vector buses are permitted to have different ranges and
still participate in merging, so they need to be disambiguated.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/5925
This moves the program-specific code (e.g. BIU files) into
the program tests.
Also, create title_block.cpp to break a dependency that pulled
in eda_text.cpp when using the TITLE_BLOCK object.
Jon Evans
Jeff Young
Ian McInerney