Add speculative typing latency parameter

[ARTI1208]

No description provided.

[codecov-commenter]

Codecov Report

Merging #77 (74670d5) into master (c5b949d) will not change coverage.
The diff coverage is n/a.

❗ Current head 74670d5 differs from pull request most recent head 9a34a14. Consider uploading reports for the commit 9a34a14 to get more accurate results

@@            Coverage Diff            @@
##             master      #77   +/-   ##
=========================================
  Coverage     25.19%   25.19%           
  Complexity       63       63           
=========================================
  Files           132      132           
  Lines          3893     3893           
  Branches        407      407           
=========================================
  Hits            981      981           
  Misses         2891     2891           
  Partials         21       21           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c5b949d...9a34a14. Read the comment docs.

[SerVB]

Could you please also remind why can it be useful to set it to non-zero? I would also suggest to mention it in the Web Client README in the table of parameters.

[ARTI1208]

It allows simpler debugging speculative typing - you can see speculative symbols longer. Another PR also allows to remove main canvas until speculative symbols are really rendered so only speculative symbols are shown. But PR 76 requires refactoring and some fixes, have no time to do this right now. Also README contains new parameter description