mirrored and linked nodes ignore completed status of parent node

NOTE: settings are configured to hide completed nodes

Mirrored nodes: 
A node that was previously mirrored as the child of a completed node shows as still mirrored. 
Example: 

• X 
• Y (completed)
• --- (child of Y) [mirror of] X

Result: X will still show that it has a mirrored node.

Linked nodes:
When typing the [[]] command to search a node to link to, nodes that are children of completed nodes appear in search results. 
Example:

• Jan (completed)
• --- (child) Task A
• Feb (completed)
• --- (child) Task A
• March
• --- (child) Task A

Result: When typing [[Task A]], all three appear in search results, despite Jan and Feb being completed. 

Expected behavior: children of completed nodes would be treated as completed for mirroring and linking purposes, especially since they don't appear in search when "show completed" is off.