Paginate lists

Set server side page size to 10
Set appropriate pageSize if necessary for pagination in setup, disk,
pool and share pages
Merge branch 'master' into issue#233_paginate_list
Pagination for all lists

Change page size in settings to 15
Add pagination for nfs exports, replication task table, and share nfs
exports
Pagination

Dislay pagination only if more than one page
Add pagination for networks, services, users, scheduled tasks
Fix cleanup method in disk utilization widget
Pagination

Set page_size to max page size in widgets so that all data is fetched in
one page
Pagination

Add pagination for probe list
Add pagination mixin for ProbeRunListView
Change disks variable to collection so that pagination mixin works
Merge pull request #327 from sujeetsr/issue#233_paginate_list

Issue#233 paginate list
Add documentation link on the nav bar
Merge pull request #332 from Mchakravartula/issue#262_documentation_navbar

Add documentation link on the nav bar
Fixes #262
Merge branch 'issue#326' of https://github.com/schakrava/rockstor-core into schakrava-issue#326
Rockstor 2.0 changes

Remove unused js lib in login.html and setup.html
Remove NGINX_WEBSOCKET_PORT variable in login.html and setup.html
Fix typo in settings for ADMIN_SHELL