Vpr viewer and flat routing on

[w0lek]

Related Issue

#3064

How Has This Been Tested?

manual test:

• run vpr viewer with following command
  ./vpr test_post_verilog_arch.xml unconnected.eblif --device auto --timing_analysis on --constant_net_method route --clock_modeling ideal --exit_before_pack off --circuit_format eblif --absorb_buffer_luts off --route_chan_width 180 --flat_routing on --gen_post_synthesis_netlist on --timing_report_npaths 100 --timing_report_detail netlist --allow_dangling_combinational_nodes on --analysis --disp on
• select different Node Id or Node name based on unconnected.route in search bar, observe visual.
  check that visual nodes representation corresponds to nodes listed in unconnected.route file.

Types of changes

• Bug fix (change which fixes an issue)
• New feature (change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed