The URL of the marker gene heatmap ignores the k value

[ke4]

If you paste a marker gene heatmap with a specific k value in a new tab, e.g. experiments/E-MTAB-5061/results/marker-genes?plotType=tsne&plotOption=1&k=11, the component ignores the k request parameter and defaults to the cell type option.

Steps to reproduce:

1. Paste https://wwwdev.ebi.ac.uk/gxa/sc/experiments/E-MTAB-5061/results/marker-genes?plotType=tsne&plotOption=1&k=11 into your browser.

Expected result:
Experiment page comes up with the Marker Genes tab and select k = 11 value on the Number of clusters dropdown.

Actual result:
Experiment page comes up with the Marker Genes tab, but not respecting the k value in the URL and displays k = 25 value on the Number of clusters dropdown.