Duplicated time records when we select "groups"

[onuralpszr]

trafficstars

Hello,

I don't know it is the perfect solution but we tested largely in our internal projects (20-30 projects) and It was working.

Related to this ; https://github.com/kriskbx/gitlab-time-tracker/issues/98

Thank you.

[onuralpszr]

Related with this as well : 44

[coveralls]

Coverage remained the same at 65.979% when pulling db161e36e85a091e4b64ab1d7923842662324e54 on thunderbirdtr:master into ec5ca47d2e45f087dccb6bbdddc970935a61c256 on kriskbx:master.

[knurpht]

I can that the suggested fix produces accurate results on multiple groups.