* Fix#3699
Reduce file watch hashing of open database files from every second to every 30 seconds. Additionally, only hash the first 1024 bytes of the database file. This is valid since most of the header and the entire encrypted portion are changed significantly on every save.
* Fix#3506
* Fix#2389
* Fix#2536
* Fix#2230
Every database that has been opened now watch's it's own file. This allows the database class to manage file changes and detect fail conditions during saving. Additionally, all stakeholders of the database can listen for the database file changed notification and respond accordingly.
Performed significant cleanup of the autoreload code within DatabaseWidget. Fixed several issues with handling changes due to merging, not merging, and other scenarios while reloading.
Prevent database saves to the same file if there are changes on disk that have not been merged with the open database.
Introduce modification-based change tracking in BulkFileWatcher to
reduce emitted signals caused by file changes within the same directory.
Resolves#2895.
* Fixed unending timer in BulkFileWatcher causing high CPU usage after first save
* Fix multiple SIGNAL connections found with GammaRay
* Remove horizontal scrollbar from EditWidget due to ghosting (maybe Qt bug)
BulkFileWatcher emitted multiple file change signals (like
QFileSystemWatcher) for the watched files. Introduced a delay by waiting
until the end of the event loop to aggregate signals emitted by
QFileSystemWatcher before emitting custom signals.
* Add source folder keeshare for sharing with corresponding define WITH_XC_KEESHARE
* Move common crypto parts to src/crypto/ssh
* Extended OpenSSHKey
* Move filewatching to own file (currently in two related classes DelayedFileWatcher and BulkFileWatcher)
* Small improvements for style and code in several classes
* Sharing is secured using RSA-Keys which are generated on demand
* Publisher signs the container using their private key
* Client can verify the signed container and choose to decline an import,
import only once or trust the publisher and automatically import all
data of this source henceforth
* Integration of settings into Group-Settings, Database-Settings and Application-Settings
* Introduced dependency QuaZip as dependency to allow combined export of
key container and the (custom format) certificate
