Is your feature request related to a problem? Please describe.
when developing on collateral resources, like the nav or the footer, reloading (re-previewing) their content is not ideal.
one has to click preview in the word/google doc, which then opens a new page etc.

the reload button of the sidekick in the developer mode is great, but it should be extendable to included content (also content fragments).

Describe the solution you'd like

• the cli should record which resources belong to the currently developed page and somehow tell the sidekick.
• the sidekick should offer a drop-down button for all content to be reloaded

/cc @rofe