* Replace Google with DuckDuckGo for optional fallback favicon fetch URL
Modify the work initially done in #36, and most recently modified in #1786,
to use DuckDuckGo's https://icons.duckduckgo.com/ip3/www.example.com.ico
favicon endpoint.
Fixes#2258
* Close failed favicon fetch progress bars
Name the UrlFetchProgressDialog() with the corresponding URL in order to
be identified by name by its parent when the failed request is handeled
in EditWidgetIcons::fetchFinished(). fetchFinished() retrieves the
relevant UrlFetchProgressDialog() and calls close() on it.
Fixes: #2265
* Group::findGroupByPath now limited to search from root (matching current usage)
* Factors out Group::findGroupByPathRecursion (on prenormalized strings).
* 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
* Usage of "enumerate()" with start parameter
* Use the with keyword when dealing with file objects
According to: https://docs.python.org/3.6/tutorial/inputoutput.html
* String format using ".format()"
* Chained comparisons are faster than using the "and" operator
- Show all URL schemes in entry view [#1768]
- Disable merge when database is locked [#1975]
- Fix intermittent crashes with favorite icon downloads [#1980]
- Provide potential crash warning to Qt 5.5.x users [#2211]
- Disable apply button when creating new entry/group to prevent data loss [#2204]
- Allow for 12 hour timeout to lock idle database [#2173]
- Multiple SSH Agent fixes [#1981, #2117]
- Multiple Browser Integration enhancements [#1993, #2003, #2055, #2116, #2159, #2174, #2185]
- Fix browser proxy application not closing properly [#2142]
- Add real names and Patreon supporters to about dialog [#2214]
- Add settings button to toolbar, Donate button, and Report a Bug button to help menu [#2214]
- Enhancements to release-tool to appsign intermediate build products [#2101]
* Added Patreon contributors
* Added real names to project maintainers
* Cleaned up layout
* Added settings button to main toolbar
* Added actions for "Donate" and "Report a Bug" to help menu
The previous default was to expect passphrases to be ASCII or
rather Latin-1. It would be reasonable to expect modern keys to
use UTF-8 instead.
This is a non-breaking change if passphrases only use characters
that fall within ASCII.
Fixes#2102
