Release refs/tags/v3.2.0

What's Changed

• feat: add config for hiding pages in navigation bar by @sbgap in #144
• fix: remove notifications without any receivers by @sbgap in #145
• fix: select only distinct notification groups by @sbgap in #146
• feat: add export of manual setup by @sbgap in #147
• Feat: add bulk action, bulk post alerts, and bulk delete of alerts by @sbgap in #148
• fix: add h"." in history filter for columns appearing in alert and history by @sbgap in #149
• feat: add alert_id to keep track of which alert a history belongs to by @sbgap in #150

Full Changelog: v3.1.4...v3.2.0