Create assertion 'templates' so you can apply & edit an assertion to multiple test steps

Right now, assertions are individually managed as unique entries on each test step. I can 'clone' an assertion to multiple other test steps/cases/suites, but it is only a copy. If i have an assertion i want to apply multiple places, it would be EXTREMELY helpful to create a template assertion and apply it to all the relevant test steps. 

This way if i need to modify the assertion across the board, i could update it in one place rather than editing each individual assertion for every. single. test. step.