UE not appearing on the map when Location coordinates is null even if path coordinates is not null

[pastorsx]

Describe the bug
When setting a "Path coordinates" for a UE, but not setting a "Location coordinates", the UE doesn't show on the map so the user has no idea if the UE is moving along the path or not.

To Reproduce
Steps to reproduce the behavior:

1. Open Element Configuration (by clicking on an element in the scenario or adding a new one)
2. Set a path coordinates by copy-pasting a valid path from another element
3. Set the velocity to any value
4. Make sure the Location coordinates is not set
5. Click on Apply

Work Around
When setting the an initial "Location coordinates", everything is showing up as expected.

Expected behavior
Expected behavior is to see the UE on the map moving when movement is turned on, or stopped when no movement is set.

Screenshots
[not applicable]

Scenario
[not applicable]

AdvantEDGE versions
1.5

AdvantEDGE node:
Information on the node where AdvantEDGE is running

• OS: Ubuntu
• Node IP address: [not applicable]
• Version 16.04LTS

Front-end node:
If different than AdvantEDGE node, information on the system running the front-end browser
Using AdvantEDGE frontend

Other nodes (please complete the following information):
[not applicable]

Additional context
[not applicable]