Merge pull request crowi#482 from crowi/wip-v1.7.9

Prepare v1.7.9

Merge pull request crowi#460 from crowi/wip-v1.7.8

Prepare v1.7.8

Merge pull request crowi#458 from crowi/fix/admin-notification-page

Fix admin notification page

Merge pull request crowi#405 from crowi/wip-v1.7.6

Prepare v1.7.6

Merge pull request crowi#392 from crowi/wip-v1.7.5

Prepare v1.7.5

Merge pull request crowi#372 from crowi/wip-v1.7.4

Prepare v1.7.4

Merge pull request crowi#363 from crowi/wip-v1.7.3

Prepare v1.7.3

Merge pull request crowi#353 from crowi/wip-v1.7.2

Prepare v1.7.2

Merge pull request crowi#351 from crowi/fix-sort-error

Fix sort error

Merge pull request crowi#340 from crowi/wip-v1.7.0

Prepare v1.7.0