Jaka

##### Issue ##### Description of changes ##### Includes - [X] Code changes - [ ] Tests - [ ] Documentation

[ENH] Scatter Plot, Violin plot: basic (sampled) view of DaskTables

4

This makes basic view into the data possible. The sampling is too aggressive. In the future we'd like to handle selections on the full data set. Also, when zooming in...

Since today you can install [pyclipper](https://anaconda.org/conda-forge/pyclipper) through conda channels. conda recipe: https://github.com/conda-forge/pyclipper-feedstock

OWVolcanoPlot: general improvements, use of GeneScoring component

2

##### description Separate Gene scoring into a separate component. Bug fixes. ##### Includes - [X] Code changes - [X] Tests - [ ] Documentation

Code coverage should not be below (at least) 85%. ##### Progress (%) - [X] 20 - [X] 40 - [ ] 60 - [ ] 80 - [ ] 90

Current gene ontology enrichment runs quite slow and consumes a lot of system memory. The proposal is, that we use gotea module from Genialis repository: https://github.com/genialis/gotea Usage: https://github.com/genialis/resolwe-bio/blob/master/resolwe_bio/tools/goea.py#L64 This change...

Also, and this may not belong in this PR, but would be an improvement, maybe coloring the dots according to their mean expression would make sense. Something like what [scanpy](https://scanpy.readthedocs.io/en/stable/api/scanpy.pl.dotplot.html#scanpy.pl.dotplot)...