Added panel.content.isLocked getter to replace panel.view.isLocked
Reasoning
Fits thematically better to the content module
Later on, save API calls might also return a lock, so it's better to keep them nearby. To be determined if the views should still receive lock as prop or if that's completely moved to the content module (if we could Fiber-fy it).
Description
Summary of changes
panel.content.isLockedgetter to replacepanel.view.isLockedReasoning
saveAPI calls might also return a lock, so it's better to keep them nearby. To be determined if the views should still receivelockas prop or if that's completely moved to the content module (if we could Fiber-fy it).