vt220: fix k1-k4 to be more compatible with xterm and other emulators. Simplify se/ue for emulators
vt220: fix k1-k4 to be more compatible with xterm
and other emulators.
Simplify se/ue for emulators

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase