[FIX] Line Plot: Reset axis ticks on data change

[VesnaT]

Issue

In some cases tick texts retain after changing data on widget's input.
To reproduce:

• File(Iris) -> Select columns (Click Reset just in case) -> Line Plot (Check Mean)
• In Select column move all features to Available variables -> Ticks on Line plot retain

Description of changes

Remove tick texts on data change.

Includes

• Code changes
• Tests
• Documentation

[codecov]

Codecov Report

Merging #4873 into master will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4873      +/-   ##
==========================================
- Coverage   84.17%   84.14%   -0.03%     
==========================================
  Files         282      277       -5     
  Lines       57464    56638     -826     
==========================================
- Hits        48368    47658     -710     
+ Misses       9096     8980     -116