delete all uris: don't display 0

[mfiaudrin-epsyl]

This fix resolve the '0' displayed whereas it shouldn't when the button to delete all URIs is hide.

It Closes #40 if @deepakmaroo confirm that there is no more bugs seen in #40.

[deepakmaroo]

Thank you @mfiaudrin-epsyl , I have tested and delete _all is workign fine.
The template is working fine for uri imas:hdf5?path=/work/imas/shared/imasdb/ITER/3/100003/1 and PlotKineticProfilesIbexState.json.
But same is not working for PlotScenarioIbexState.json and it appears blank workspace...

[mfiaudrin-epsyl]

Hi @deepakmaroo,
Thank you for your tests. I have reproduced it, I am on it

[mfiaudrin-epsyl]

@deepakmaroo, After some investigations, the bug you mention is caused by 2 bugs:

• The first has already been fixed in PR Feature/implement frontend tests #45
• The second is currently adressed in Issue coordinate dependencies list isn't always in the correct order #48

Once PR #45 has been merged and Issue #48 has been fixed and merged, the bug you mentioned should be resolved.

If you'd like, we can leave this PR open and close it once the rebase of both fixes has been completed, to ensure it's definitively fixed.

[deepakmaroo]

This PR contains reasonable changes and poses no issues, so it can merged