This reverts commit b98dfc3b.

=> requires too modern KWindowSystem

stop button no longer did show up
now it does again
code now uses widget name an not just index to make usage more clear

... since marks and ranges can be enabled separately.

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"

Rename kate target to kate-lib to fix Windows compilation error

See merge request !5

Main CMake scripts cleanup

See merge request !4

- Use target based commands instead of source variables and directory
based commands.
- Move `find_package` calls from top level CMake script into kate and
kwrite subdirectories. This is consistent with the addons where each
target finds its own required dependencies.
- Syntax cleanup: Two spaces indentation and, spaces after command
names and split long commands over multiple lines.
- Append to `CMAKE_MODULE_PATH` instead of overriding it so that it can
be overriden manually from the command line by developers if needed.
- Remove obvious comments.
- Remove nested `project` calls as they are unnecessary.
- Rename `kdeinit_kate` to `kate` and `kate` to `kate-bin`.
- Remove `qt5_add_resources` usage and pass resource files directly to
`target_sources` instead (thanks to `CMAKE_AUTORC`).
- Remove unnecessary and transitive dependencies.
- Exclusively use variables for MacOS bundle strings.

- Use separate config.h files for kate and kwrite.
- Add `KWRITE_VERSION` for use in kwrite source code.
- Use the more widely used .in suffix for config.h templates instead of
the .cmake suffix which is primarily used by CMake script files.
- Rename `KActivities_FOUND` define to `KF5Activities_FOUND` so that
cmakedefine in config.h.in automatically picks it up when
`KF5Activities_FOUND` is set during CMake's configure stage.
- Remove config.h include from source files that don't need it.

Further cleanup addons CMake scripts.

See merge request !3

- Update CMake minimum required version to CMake 3.1 which is when
`target_sources` was added.
- Use `target_sources` even when commands that work on
sources variables are used. Instead of appending the generated sources
to an existing sources variable, we store them in a temporary variable
and immediately add them to the corresponding target with
`target_sources`.
- Remove unnecessary dependencies on `kdeinit_kate`.
- Remove the intermediary katefiletree static library and have the tests
build the single required source file manually instead which is
consistent with how the other addons with tests work.

Summary: BUG: 391207

Reviewers: cullmann, ngraham

Reviewed By: cullmann

Subscribers: dhaumann, kwrite-devel

Tags: #kate

Differential Revision: https://phabricator.kde.org/D22479

katequickopen: add config option to present current or all project files

See merge request !2

... which is especially useful/needed when dealing with a large number of small
repos as opposed to one or few large repos.

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"

build-plugin: also accept + in message filename detection

See merge request !1

... such as e.g. in /usr/include/c++

Otherwise, in a message such as the following, only the part following c++
is extracted as a filename:
/usr/include/c++/8/bits/basic_string.h:420:7: