Applying AlignDepth filter after Pointcloud

[Arun-Prasad-V]

Fixing #2595.

Issue:

• When both PointCloud and AlignDepth filters are enabled, the point cloud output has misaligned colored point cloud

Root cause:

• First Align Depth filter process the frame and then Point Cloud filter uses the same processed frame and internally align again
• That's why color is getting registered twice

Proposed Solution:

• Apply the Point Cloud filter first
  • So, it will get the unprocessed frame and internally do the alignment
  • The alignment will only happen on point cloud's data and the original depth frame will be untouched
• Then, apply the Align Depth filter
  • It will get the original depth frame and does the alignment

[SamerKhshiboun]

LGTM.
@Nir-Az should we wait for user confirmation? or should we merge it ?

[Nir-Az]

LGTM. @Nir-Az should we wait for user confirmation? or should we merge it ?

Since the last comment was 2 weeks ago and it was tested by us then we will merge and monitor the issue for user feedback :)