XWIKI-11540: Adjust the boxes' sizes for mobile

* Fix the build.

* Merge branch 'feature-less-ssx'.

* Because of a bug on the CLIRR plugin, set the CLIRR configuration in the LESS module pom instead of the top level project.

* Minor changes.

* Minor improvement about the cached compiler mutex.

* Close the picker when the user presses 'escape' and so fix the failing integration test.

XWIKI-11528: Office viewer fails if the page where the file is attached has a special character in the name (whitespace)
* Add only the office file name to the temporary file path if the resource is specified by an attachment reference, because the rest of the information (wiki/space/page) are already included in the path.
* Use Base64 encoding for the resource reference when adding it to the path because it can contain special characters that are prohibited in the URL by some servlet containers even when they are URL-encoded.

* Update init.vm

* Add RequireJS WebJar as mandatory dependency to the packager mojo.

* Add the property "contentType" to the SSX objects
* SSX objects can handle LESS code
* Create Skin and Color Theme references
* Continuing the refactoring of the LESS module to be able to compile LESS resources that are not files
* Lot of tests done locally in addition of unit tests, that is why I allow myself to low down the jacoco requirement, with the ambition to write new tests in the following weeks.

- Missing break

- The macro is now checking if the attachment file exists
- Added test and updated existing ones

- Excluded the template when deleting entries

* Remove the require.js file bundled with xwiki-platform-web
* Modify javascript.vm (both in platform-web and flamingo-skin) to load RequireJS as webjar
* Declare dependencies to RequireJS and JQuery webjars.

* Update test page objects.

* First implementation of SSX using LESS.
* Todo: a cache cleaner when a SSX is saved.

* Improve the #sheetTitle macro to support a common use case: displaying the sheet title only when the current document has an object of some type
* Improve the title of the SchedulerJobSheet
* Remove the usage of the deprecated EditModeClass on the SchedulerJobSheet
* No need to include the sheet in the content of the SchedulerJobTemplate and the default WatchList jobs

* Apply new XAR format.

* Big refactor

* Use the .min suffix in the default yuicompressor configuration because it's a best practice.
* Add support for running JSHint on JavaScript code at build time.
* Fix JSHint errors in the job and tree webjars
* Use strict JavaScript in the job and tree webjars

[misc] Make sure the copy-webjar-resources and minify-webjar-resources executions are not run by default. Unfortunately there's no other way to reuse executions: we need to specify the phase everywhere.

XWIKI-11552: Suggestion lists of 'suggestDocuments' and 'suggestSpaces' inputs get hidden when overflowing the 'xwikicontent' parent's height
- Using the default parentContainer.

XWIKI-11528: Office viewer fails if the page where the file is attached has a special character in the name (whitespace)
* Ensure the path to the temporary file is fully encoded (canonical form) even if the URL used to access the file is partially decoded (which can happen for instance when XWiki is behind Apache's mode_proxy with nocanon option disabled).