Origin of new sphere marker has an offset

[Levaru]

I noticed that since the new commit 2cf0b24 the sphere marker has a light offset, most likely caused by a wrong origin when the mesh file was created.

You can barely see it in this screenshot, but it is quite noticeable in my application.

My environment

• OS Version: e.g. Ubuntu 18.04
• ROS Distro: Melodic
• RViz, Qt, OGRE, OpenGl version as printed by rviz:

  [ INFO]: rviz version 1.13.7
  [ INFO]: compiled against Qt version 5.9.5
  [ INFO]: compiled against OGRE version 1.9.0 (Ghadamon)
  [ INFO]: Forcing OpenGl version 0.
  [ INFO]: Stereo is NOT SUPPORTED
  [ INFO]: OpenGl version: 3 (GLSL 1.3).
  

[rhaschke]

@wxmerkt, please can you have a look at this issue as you authored the original PR #1463.

[wxmerkt]

Yes, I will take a look at it.

[wxmerkt]

Please take a look at #1487 - I fixed the issue with the sphere being off centre.