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

Prepare v1.7.9

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

Prepare v1.7.8

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

Fix admin notification page

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

Prepare v1.7.6

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

Prepare v1.7.5

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

Prepare v1.7.4

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

Prepare v1.7.3

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

Prepare v1.7.2

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

Fix sort error

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

Prepare v1.7.0