Prior to this change the `DomainServerSettingsManager::persistToFile()`
method wrote directly to the settings file. It also did limited error
checking. These limitations could lead to a situation where a crashed
domain-server process, a file system backup, a settings file copy, or a
hardware error could corrupt the setting file.
This change swaps the `QFile` class for `QSaveFile` and uses its atomic
saving features, which writes the changes to the settings file to a file
in the same directory as the settings file and then does a rename to
replace the original. If the rename, or any of the file operations, fail
the original settings file remains in place.
* Domain settings version has been bumped from version 2.0 to 2.1
* Old domain settings for avatar scale will be auto-converted to avatar height
* Avatar code has been changed so that limitDomainScale() works with the new height limits
* Avatar getUnscaledEyeHeight() was added to C++.
* MyAvatar.getHeight() was added to JS.
* canRez(Tmp)Certified()
* CertifiedItem beginnings
* Skeleton of verifyOwnerChallenge()
* Controlled failure; updateLocation() skeletion
* Controlled failure on checkout page with ctrl+f
* Skeleton Purchases first-use tutorial
* Initial progress on new setup
* Security pic tip
* Skeleton Certificate page
* Updates to Certificate
* General progress; setup is nearly complete
* Better buttons; last step almost done
* Initial progress on wallet home
* Completed recent transactions
* Security page
* Scrollbar
* Fix auth error text
* PassphraseSelection
* Change security pic
* Minor layout changes; beginnings of emulated header
* Various layout changes; wallet nav bar
* Help screen
* Quick onaccepted change
* First pass at new purchases
* Small style updates
* Some error progress
* Lightbox in purchases
* Collapse other help answers when clicking on another
* REZZED notif
* Commerce Lightbox
* Lots of new interactions in Purchases
* Hook up 'view certificate'
* Fix errors, fix close button on cert
* Purchases timer; much faster filter
* Add debugCheckout
* Purchase updates
* GlyphButton; separator; Checkout Success; Ledger fix; debug modes
* Lock glyph below security pic should be white
* Various fixes, round 1
* Circular mask
* Passphrase change button fix; TextField error edge highlighting
* Recent Activity fixes
* Various changes
* Standard Security Pic location
* Color changes
* Filter bar changes
* Styling for multiple owned items
* Minor language change
* Header dropdown (harder than expected)
* Small fixes
* View backup instructions
* marketplaces.js onCommerceScreen
* Beginnign of new injection
* Marketplace injection changes
* Purchase button style changes
* More button styling
* MY PURCHASES button
* marketplace onUsernameChanged
* New help QA
* Help text changes etc
* Downscale security image, reducing filesize
* Lots of bugfixes
* Cleanup before PR
* Only open cert during inspection if commerce switch is on
* Help text changes
* Purchase status incl. change to confirmed; Help text; Open Explorer to hifikey
* Quick glyph change
* New 'wallet not set up' flow for when entering Purchases or Checkout without set-up wallet
