Keep aspect ratio for thumbnails

[raldone01]

If someone wants cropped thumbnails this can be put behind an option in the settings but I see no use case for this.

Fixes: #6154

[mgallien]

thanks

[raldone01]

Mhh it seems to not have worked. I was unable to build the client under windows.

I have now setup a hyper-v ubuntu vm.
The build instructions are very outdated.
Here are current ones:

Setting up a build enviornment for nextcloud-desktop

1. Install ubuntu noble (Ubuntu 24.04.1 LTS)

• At least 8GB RAM otherwise oom when building
• At least 70GB of storage

2. Setup apt to allow the install of oracular packages

/etc/apt/preferences.d/zubuntu_oracular

Package: *
Pin: release n=oracular
Pin-Priority: 1

/etc/apt/sources.list.d/zubuntu_oracular.sources

Types: deb
URIs: http://archive.ubuntu.com/ubuntu/
Suites: oracular oracular-updates oracular-backports
Components: main restricted universe multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

3. Install the build dependencies with apt

sudo apt update
sudo apt install -t oracular cmake extra-cmake-modules g++ inkscape \
sphinx libcmocka-dev \
doxygen graphviz \
dolphin libkf6kio-dev \
openssl libssl-dev libzip-dev sqlite3 libsqlite3-dev zlib1g-dev shared-mime-info \
qt6-base-dev qt6-base-private-dev qt6-5compat-dev \
libkf6guiaddons-dev libkf6archive-dev libkf6archive-doc libkf6archive6 \
qt6-declarative-private-dev qt6-declarative-dev qt6-declarative-dev-tools \
qt6-webengine-dev qt6-webengine-dev-tools qt6-webengine-private-dev \
qt6-tools-dev qt6-tools-private-dev qt6-tools-dev-tools \
libqt6websockets6 qt6-websockets-dev qt6-websockets-private-dev \
qtquickcontrols2-5-dev qtquickcontrols2-5-private-dev \
qtkeychain-qt6-dev qt6-svg-dev \
texlive-latex-base texlive-fonts-recommended texlive-fonts-extra texlive-latex-extra

4. Build and install

$ git clone https://github.com/nextcloud/desktop.git
$ cd desktop
$ cmake -S . -B build -DCMAKE_INSTALL_PREFIX=~/nextcloud-desktop-client -DCMAKE_BUILD_TYPE=Debug
$ sudo cmake --build build --target install -j $(nproc)