Keepassxc saves application state at XDG_CACHE_HOME which can be cleared on some systems periodicly.
This is not desireable as app state like window size is not consistent when openning the app.
To avoid this this commit is switching the path to XDG_STATE_HOME which is more fitting based on the freedesktop basedir spec (https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html), this will allow to prevent state file deletion as well.
Resolves#9738
* Update INSTALL.md to align with Wiki
* Add sections for new 2.7.0 features including Quick Unlock, Tags, Browser Integration settings, Auto-Type improvements, etc.
* Update all documentation images to show new interface details
* Expand documentation for database operations
Significant improvements to the Auto-Type select dialog. Reduce stale and unnecessary code paths.
* Close select dialog when databases are locked.
* Close open modal dialogs prior to showing the Auto-Type select dialog to prevent interference.
* Never perform Auto-Type on the KeePassXC window.
* Only filter match list based on Group, Title, and Username column data (ie, ignore sequence column)
* Always show the sequence column (revert feature)
* Show selection dialog if there are no matches to allow for a database search
* Close#3630 - Allow typing {USERNAME} and {PASSWORD} from selection dialog (right-click menu).
* Close#429 - Ability to search open databases for an entry from the Auto-Type selection dialog.
* Fix#5361 - Default size of selection dialog doesn't cut off matches
* Fix#5313, allow specifying local config path using environment variable and command line flag
* Add command line flag `--localconfig <path>` to specify a file path to use for the local configuration settings.
* Add environment variable support to set config files paths: `KPXC_CONFIG` and `KPXC_CONFIG_LOCAL` to override default locations.
* Reorder startup sequence to load specified config files earlier to allow for theme settings and other early options to be picked up.
* Removed old command line option `--pw`, no longer used.
* Attempt a fix of application not closing when last window is gone. Only set `QApplication::setQuitOnLastWindowClosed(true)` when tray icon is enabled instead of always.
