Fixes #19365 - display loading spinner instead of text

Fixes #19176 - fix translated strings in select all hosts

Fixes #19309 - Only select first hosts page on select all (#4467)

Fixes #16043 - add select all hosts option

Fixes #19122 - clear selected hosts in new search

i18n - extracting new, pulling from tx

fixes #18064 - import host from compute resource

Fixes #18264 - change select multiple host actions to POST

When selecting large amount of hosts for bulk action,
url is getting too long and may cause 414 error.
To avoid that, hosts_ids should send via post request
within the body.

fixes #16288 - moves ace editor to webpack.

I've tried to limit changes to minimum, besides fixing lint errors i've:
- moved to brace package (as its compatable with br and webpack).
- added ERB as a syntex highlight.

fixes #18796 - do not flot charts by default

flot initalization relay on css class, if the css class conflict,
legacy flot to try and initalize on the same div as c3.

this removes charts.js to load by default, and only load it in pages
which requires it.