re-declare deprecated functions for backward compatibility

`dbg_deprecated()` is called in `html_diff_head()`, `html_diff_navigation()`, `html_diff_navigationlink()`, and following functions:

* `h

re-declare deprecated functions for backward compatibility

`dbg_deprecated()` is called in `html_diff_head()`, `html_diff_navigation()`, `html_diff_navigationlink()`, and following functions:

* `html_denied()` is not used any plugins, but added fallback just in case.
* `html_locked()` is used by one third-party plugin (AjaxEdit), fallback should be added.
* `html_insert_softbreaks()` is used by one third-party plugin (TOS, terms of service), fallback should be added.

show more ...

change event naming scheme

FORM_*_OUTPUT scheme had been introduced since Apriil 2018, see #2286

fix Scrutinizer annotations

fix Scrutinizer annotations

fix missing or unnecessary use Event statements

tigger HTMLFORM_*_OUTPUT events

trigger events in Form::toHTML() instead of using Event::createAndTrigger()

remove unnecessary printing DOKU_LF

split longer show() into task methods.

The structure of Ui\Revisions is similar to Ui\Recent. Ui\Revisions::getRevisions() returns a arrey of rev info array as same as getRecent().

shorten Ui\Recent::show(), split out sub methods

Requrie *PHP7*, using anonymous class in Ui\Recent::getObjRevInfo()

added logviwer admin plugin

This allows for easy viewing of the available logs.

The log format was sligthly adjusted again for easier parsing.

use $INPUT instead of $_SERVER

split out two form creation methods of ResendPwd

we can use prefillInput feature of InputElement class, no need to refer $INPUT in formResendPassword()

wrap sorting functions into their own class

declare method visivility

Ui\Subscribe class replaces tpl_subscribe()

fix Ui\Diff::diffHead() scope public

html_diff_head() was used in inc/media.php

add space delimiters inside the list item

Bugfix missing div.no tag just after the form tag in Ui\Revisions::show()

create Ui\Index::buildIndexList()

html_sizechange() returns HTML when $form is not set

use more $difftype property, and rewrite callback func to closure

define Ui\Diff::insertSoftbreaks() method

print forms without html_form_output()

use "difftype" in Ui\Diff

fix typo

create constructor of Ui\(Recent, Revisions)