Use safe delete in deletion quick fixes

[slideclimb]

Fix TEX-16

Summary of additions and changes

• LaTeX inspection that detects if labeled figure is not referenced now includes a safe delete quick fix to delete the figure environment.
• BibTeX inspection that detects if bib item is not used now uses safe deletion instead of regular deletion.

Known bug The text in the safe delete dialog is a bit weird and there doesn't seem to be a way to customise it.

How to test this pull request

\usepackage{biblatex}

\addbibresource{references.bib}

\begin{document}
%    Hallo~\cite{goossens1993}

%    test~\ref{fig:hj}
    hallo
    \begin{figure}
        \centering
        \includegraphics{}
        \caption{}
        \label{fig:hj}
    \end{figure}
    doei
\end{document}

@string{mytext = "This is a note."}

@Article{greenwade1993,
    author  = "George D. Greenwade",
    title   = "The {C}omprehensive {T}ex {A}rchive {N}etwork ({CTAN})",
    year    = "1993",
    journal = "TUGBoat",
    volume  = "14",
    number  = "3",
    pages   = "342--351",
    note    = mytext,
}

@Book{goossens1993,
    author    = "Michel Goossens and Frank Mittelbach and Alexander Samarin",
    title     = "The LaTeX Companion",
    year      = "1993",
    publisher = "Addison-Wesley",
    address   = "Reading, Massachusetts"
}

Example of safe delete finding a usage in a comment:

Wiki

• Updated the wiki: https://github.com/Hannah-Sten/TeXiFy-IDEA/wiki/BibTex-inspections#Bib-entry-is-not-used

[PHPirates]

I think I've had this before, where a UI element takes the psi element class name instead of human readable name, will try to find how to change that.

[PHPirates]