add link to merging modules page.
merge modules storage functionality draft. Refs #17083
map all columns except xml schemas. Refs #17083
allow to save xml schemas. Refs #17083
name must be unique. Refs #17083
hibernate length checks. Refs #17083
merge modules controller draft. Refs #17083
view all merge modules in UI. Refs #17083
add merge module UI draft. Refs #17083
allow to save modules in storage. Refs #17083
rollback changes after tests. Refs #17083