Rename UI elements involved with the bottom preview panel to use the
terminology "entry preview panel" instead of "details view" or "preview
panel". Change all associated variables, widgets, and classes to
reference EntryPreviewPanel. Create Config::upgrade() function and
deprecation mapping to help rename/remove previous config settings in a
clean manner.
Fixes#2327
* Eliminate TOTP logic from GUI elements
* Consolidate TOTP functionality under the Totp namespace
* Eliminate guessing about state and encoders
* Increased test cases
* Add entry view column for TOTP [#2132]
* General code cleanup, reduction of unnecessary steps, separation of concerns
* Rename SetupTotpDialog to TotpSetupDialog for consistency
- Fix crash when deleting TOTP entry
- Fix memory leak when selecting TOTP entries
- Fix TOTP update timeout on DetailsWidget
- Fix TOTP settings attributes not being applied before first call to totpSeed()
* Add the concept of custom TOTP encoders, each with potential for custom
code alphabet, length, step interval and code direction (i.e. reversed)
* Select custom encoder via overload of the digits field of a loaded entry
* Allow selection of custom encoders via the "TOTP Settings" field's
size, as currently done by KeeTrayTOTP for Steam. Use "S" for the
short name of the Steam custom encoder
* Allow selection of custom encoders via the "otp" field by appending
a "&encoder=<name>" field to the URL query. For example,
"&encoder=steam"
* Update TOTP set-up dialog to permit selection between (default,
steam, custom) settings.
- Fix multiple activations of updateTotp by different QTimer instance timeouts.
- Fix call to updateTotp with invalid, uninitialized state
- Fix tooltip description
