137 Bugfixes and Chapter Managment

[ND68]

PR Title

Issue Number(s): 137

What does this PR change and why?

• add volunteer modal to chapter
• pagination fix
• pending volunteers notif
• operation success popups

Checklist

• [x ] Requirements have been implemented
• [ x] Acceptance criteria are met
• [ x] Database schema docs have been updated or are not necessary
• [ x] Code follows design and style guidelines
• [ x] Commits follow guidelines (concise, squashed, etc)
• [ x] Relevant reviewers (Senior Dev/EM/Designers) have been assigned to this PR

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[johannesq23]

looks great to me, great job!