Option to always display pop-ups/announcements regardless of prior views

Description: Add a per-announcement (or global) setting that lets admins disable the "already seen" tracking currently handled via sleekstorage (with cookie fallback), so a specific pop-up or announcement can be shown to a visitor on every visit/session rather than only once. Problem: Currently, once a visitor has seen a pop-up changelog announcement, Sleekplan remembers this via web storage/cookies and suppresses it on future visits. There's no way to override this behavior for cases where an admin genuinely wants a message to appear every time a user visits the site, regardless of whether they've dismissed or seen it before (e.g. recurring reminders, mandatory notices, or high-priority announcements that need repeated visibility). For the rest of the popup types , settings can be configured so they have a repeated display based on defined intervals. The changelog popups do not have this settings aVailable. Benefit: Gives admins more control over messaging cadence for time-sensitive or high-priority content, without needing workarounds like manually clearing visitor storage (which isn't practical at scale) or creating a new announcement each time to bypass the "seen" flag.