GitLab

cmake to 3.16
Qt to 5.15 ( which is also min req for KF 5.82 )
Remove redundant KF version check ( we are already 5.82 )

The session keys are already unique, consequently there can be no
duplicated in the list.

So far we've been setting _NET_WM_STATE_SKIP_TASKBAR ourselves, but
Qt messes with this, leading to race conditions where it still
appears in the taskbar. This sets the Qt::Tool window flag, which
will set it via Qt itself, and won't be clobbered. An old hack has
been removed, as it isn't needed anymore.

Also makes show animation match retract animation.

BUG: 360037

In C++20 there are new classes that have member functions named emit().
c.f.:
https://lists.qt-project.org/pipermail/development/2020-February/038812.html
https://en.cppreference.com/w/cpp/io/basic_osyncstream/emit

A similar change was done in the KDE Frameworks:
frameworks/kio!315

GIT_SILENT

If you want git blame to ignore formatting revisions run:
git config blame.ignoreRevsFile .git-blame-ignore-revs

- Remove usage of DownloadManager
- Use RemoveDeadEntries option, otherwise removed/invalid entries would still show up as installed
- Allow deletion of KNS entries, with the mentioned option set KNS will realize that the
entries were manually uninstalled. It also more intuitive to click the remove button
instead of the "Get New..." button if you want to uninstall entries.

The old QWidgets components are about to be deprecated and
the QtQuick dialog is visually nicer.

GIT_SILENT

# This MR adds the option to hide the title bar to provide a seamless visual effect.

![Screenshot_20201116_112104](https://invent.kde.org/utilities/yakuake/uploads/f248b52cfee904f8327d9e5f373a89c0/Screenshot_20201116_112104.png)

## Changes

To facilitate this change the borders also got an option to be hidden:
*Note:* The bottom border also moved from the skins background to `MainWindow::paintEvent`. The color and width are following the specification provided by the skin.

![image](https://invent.kde.org/utilities/yakuake/uploads/267141465e082ff35fbb3c0fc7e8a6f0/image.png)

## Safeguards

To warn the user that they are about to hide the title bar, which is (when no tray icon is displayed) the only option to access the settings (besides from to the user maybe not known keyboard shortcut) and re-show the title bar, a dialog opens when the user presses the shortcut (default: Ctrl+Shift+m following konsole's model) or is about change the setting in the settings window (red circle): ![image](https://invent.kde.org/utilities/yakuake/uploads/2e57d8eea7e5b3fc28cd64c25a219332/image.png) *Note: in this screen shot a border (yellow circles) at the bottom of the terminal is still present, this is because the skin gets loaded from the systems installation and not the development directory. This border is not part of the skin anymore. Also note that the windows on my desktop have no borders, this is a personal choice and does not affect other users.*

Choosing to not display on of the dialog anymore (checking the "Don't show this message again" checkbox) hides the dialog in both places. If the dialog is triggered by the keyboard shortcut, rejecting the dialog will keep the title bar visible. If the dialog is triggered by checking the checkbox in the settings window and the user rejects the dialog the checkbox is reset to unchecked.

Silence warning from `systemd-xdg-autostart-generator` on session startup.

The replacement is only available in Qt 5.14 which IMO is a reasonable requirement.

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"

Consider renaming tabs via DBus interactive. This allows it to override a previouly interactively set title.

BUG: 428400

They are the same on Linux (but DataLocation is deprecated). On Windows this enables the use of the roaming path.

NO_CHANGELOG

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"