This reverts commit 1f3cd34795db6fcbfdc94cd22772bc4dc24f392a.

The patch was submitted by Juraj Pálenik.

This conditional determines, whether the scanned assignment
specified by the `assignment` key is going to be hidden in the
digital version of the document. It is by default, but some style
files (`/mu/sci`) switch this, so that the scanned assignment is
included in the digital version.

The output of \thesis@block@assignment and \thesis@@{assignment} now
depends on the value of the new \ifthesis@digital@ conditional.

The tocdepth now uses the standard numbering (\part has tocdepth of -1).
Added a visual test suite.

\MakeUppercase is now disabled in PDF text, which fixes the \part error.
\tableofcontents folding now works as indended for -1 <= tocdepth <= 4.

Removed \paragraph entries for tocdepth>4.
Chapter entries are vertically spaced for tocdepth>1.

`\thesis@blocks@clear\tableofcontents` in `\thesis@blocks@tables`.

As a result, hyperref links to appendices are no longer broken.

required packages and changes the table measurements even though
the `color` option is not specified.

style files. These set all the options appropriate for either the
printed or the digital versions of a document.

are no longer page-numbered, so that hyperref links work correctly.

The `\thesis@require` command now also takes an optional argument
and the `\thesis@requireWithOption` command has become
`\thesis@requireIfExists`.

`\thesis@selectLocale` is no longer performed globally for the
entire document during `\thesis@load` (effectively overriding the
user's hyphenation settings, if Babel's or Polyglossia's
`\languagename` differs from `\thesis@locale`). Instead,
`\thesis@preamble` and `\thesis@postamble` now locally switch the
locale and expand `\thesis@blocks@preamble` and
`\thesis@blocks@postamble`, which are the new redefinables. Since
this breaks the behaviour of `\thesis@blocks@mainMatter`, whose
effects would also be local, `\thesis@blocks@mainMatter` is now
executed directly by `\thesis@preamble` after closing the group and
becomes a new part of the interface between the class and the style
files.

As a preparation for the future inclusion of bibliography support,
the /csquotes/ package is loaded, `\thesis@<locale>@csquotesStyle`
is a new part of the locale interface that sets the /csquotes/
style of a locale, and `\thesis@selectLocale` now switches the
/csquotes/ style.