Unifies pagination template usage (#6531)

[saitho]

This pull request makes the additional URL params that are used in the pagination template configurable. This enables the usage of the same template among all pages that use a pagination.

Resolves #6531.

---

How to test

Check the paginations on all pages that use one, i.e. templates with {{template "base/paginate" .}}

• General
  • Explore repositories: http://localhost:3000/explore/repos
  • Explore users: http://localhost:3000/explore/users
  • Explore organisations: http://localhost:3000/explore/organizations
  • Explore code (redirects to explore/repos?!): http://localhost:3000/explore/code
• User
  • User home: http://localhost:3000
  • User dashboard Issues/Pulls: http://localhost:3000/issues / http://localhost:3000/pulls
  • User profile: http://localhost:3000/[username]
  • User notifications: http://localhost:3000/notifications
  • Organisation profile: http://localhost:3000/[orgname]
• Repository
  • Repository search: http://localhost:3000/[owner]/[repo]/search
  • Issue List: http://localhost:3000/[owner]/[repo]/issues
  • Milestones: http://localhost:3000/[owner]/[repo]/milestones
  • Releases: http://localhost:3000/[owner]/[repo]/releases
  • Milestone details: http://localhost:3000/[owner]/[repo]/milestone/[milestone]
  • template repo/commits_table, e.g. repository commits: http://localhost:3000/[owner]/[repo]/commits/branch/master
• Admin
  • Admin: organisation list: http://localhost:3000/admin/orgs
  • Admin: user list: http://localhost:3000/admin/users
  • Admin: repository list: http://localhost:3000/admin/repos

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@40dc458). Click here to learn what that means.
The diff coverage is 69.72%.

@@            Coverage Diff            @@
##             master    #6533   +/-   ##
=========================================
  Coverage          ?   40.83%           
=========================================
  Files             ?      419           
  Lines             ?    57340           
  Branches          ?        0           
=========================================
  Hits              ?    23413           
  Misses            ?    30804           
  Partials          ?     3123

Impacted Files	Coverage Δ
routers/repo/view.go	41.6% <0%> (ø)
routers/admin/notice.go	0% <0%> (ø)
routers/repo/milestone.go	0% <0%> (ø)
routers/repo/issue.go	37.09% <100%> (ø)
modules/context/pagination.go	100% <100%> (ø)
routers/repo/search.go	60.71% <100%> (ø)
routers/user/notification.go	48.27% <100%> (ø)
routers/repo/release.go	33.9% <100%> (ø)
modules/context/api.go	49% <22.22%> (ø)
routers/repo/commit.go	25% <50%> (ø)
... and 3 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 40dc458...94a3a83. Read the comment docs.

[zeripath]

There's a Conflict with a commit in master.

Otherwise this now looks good