7d11a093 accidentally moved the
memory pointer increase out of the '+'-handling branch, which would
either result in bad number being read or the pointer getting behind
the end and resulting in garbage memory processing, potentially ending
in a crash.

Also changing to using dedicated own variable "sign" instead of reusing
function-global variable "j" with meaningless name.
global

Fixed-in: 21.08.3
BUG: 443983

Error reporting was changed in KCoreDirlister, to match the original behaviour
we need to explicitly disable auto error handling.

This fixes a crash while searching in Dolphin, kio_filenamesearch intrenally
uses a dirlister, and a nested event loop, if there is an error while listing
some dir it tries to report it using a job ui delegate, but the parent job
could well be dead by that time, which causes a crash:
"QWidget: Cannot create a QWidget without QApplication"

Note that this crash only happens if KDE_FORK_SLAVES is _not_ set.

BUG: 438187
FIXED-IN: 21.08.3
(cherry picked from commit 5dff395e)

In libmtp 1.1.19, an empty string is returned instead of NULL for devices without a deviceName, which breaks accessing those devices with kio-mtp

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"

see 'auto QString(Builder) considered VERY HARMFUL' thread on kde-devel
https://markmail.org/message/mbrp5ypyhcfk7zjn

What happens is that the type of str ends up being QStringBuilder
instead of QString. The QStringBuilder is destroyed after the semicolon,
and all access to "str" produces undefined behavior.

Never use auto for QString concatenation!

BUG: 439877

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Use the metadata devicePixelRatio to scale up dimensions of thumbnails generated.
Sets the devicePixelRatio on the output QPixmap according to the thumbnail generated.
Make the Text Thumbnail creator devicePixelRatio aware.
Follows xdg thumbnail specs 0.9 https://specifications.freedesktop.org/thumbnail-spec/thumbnail-spec-latest.html

BUG: 342053
FIXED-IN: 21.08

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Consistency with other cmakelists.txt files, KDE settings might influence
other things, so better be set early

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Needs KArchive >= 5.82, which matches min requirements

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