ID 390374 - Sharing a layer is causing incorrect blending options for the Colorspace Enabled feature

Problem summary
Sharing a layer which has Colorspace Enabled set to Disable, creates a shared layer with Colorspace Enabled set to Enable.

Customer reported version

Customer reported platform
rhel6

Steps to reproduce

1) Open Mari and create a new project with a 16 bit colour channel 

2) Go to the layer stack and add a paintable layer

3) Open the Advanced Blending options for the paint layer and notice that the Colorspace Enabled is set to Disable 

3) Share the layer by right clicking on the layer>Share Layer

result: Go to the Advanced Blending options for the newly created shared layer and notice that the Colorspace Enabled is set to Enable

Expected behaviour
The shared layer should have the same blending options as the original

Actual behaviour
The Colorspace Enabled feature is set to Enable for the new shared layer even though the original has this setting set to Disable

Workaround

8 bit channels are unaffected as this feature is always set to Enable for 8bit channels as well as changing this option manually 

Reproduced by support
This bug has been reproduced in:

4.5v1 - Windows 10 - CentOS 7 

4.1v1 - Windows 10 

3.3v1 - Windows 10

3.2v1 - Windows 10 

3.1v2 - Windows 10 

Earliest version tested
3.1v2  - This feature did not exist before this version