Can_Member_Post functionality is used to check if the user is a member of the space.
Post New (Create post) function now takes the space id as input and this space id is selected when the form is opened if the Share Post button is used in a Space.
Share Post functionality added in conjunction with the can_member_post checks to the Space feeds.
The users should be able to share posts in the spaces that they have the right to send a post.