Merge pull request #7 from beat/jux-layout-items

Fixing reported bugs (starting by last) Part 2
Fixed Apply an Save buttons in Plugin Edit
Fixed Apply an Save buttons in Plugin Edit (better fix)
Reversed committed WIP by mistake
Reversed committed WIP by mistake
Merge pull request #8 from beat/jux-layout-items

Fixed Apply an Save buttons in Plugin Edit
Fixed News Feeds edit (numarticles, cache_time and rtl were not in params but top-level inputs)
Fixed News Feeds edit (numarticles, cache_time and rtl were not in params but top-level inputs): added the template file for display tab outside params
Merge pull request #9 from beat/jux-layout-items

Jux layout items: Fixed News Feeds edit saving
Merge pull request #2149 from elinw/helpertests

Add some more test cases and tests to JHelper.
Merge pull request #2143 from beat/feature-apps-installer-of-installer

JED info link in extensions installer and 1-click installer of "install from Web" plugin
[#31347] Introducing HTML5 form fields and attributes - GSOC (Fix #1842)
Merge pull request #2123 from wilsonge/jloadertest

Add extra assertation to give 100% coverage
Delete whitespace at end of line.
Merge pull request #2125 from beat/jux2-frontend-edit-modules

[JUX2] [07] Added front-end hover icon to modules to edit module in backend (with tooltip showing module position)
Merge branch 'master' of https://github.com/joomla/joomla-cms
[#30781] Small changes to jForm and jField to allow for repeatable form elements (Fix #1644)
Code Style
Merge branch 'master' of https://github.com/joomla/joomla-cms
Updated to check for array