Other: renaming of bridge-gui.
WIP: locate bridge exe.
WIP: bridge process launch.
WIP: cleaner closure of bridge.
WIP: grpcClient connection retries.
WIP: clean exit when bridge process is killed.
Fixed issues from MR review. [skip-ci].
WIP: Fixed gRPC case in CMakelists.txt [skip-ci]
It caused issues on Debian.
WIP: update gRPC/protobuf and tweaked CMakeLists.txt. [skip-ci]
WIP: Fixed a bug where splash screen could not be dismissed. [skip-ci]
