added not-maintained-anymore notice

disable unused button

Merge pull request Qv2ray#1071 from Qv2ray/dev

Qv2ray v2.7.0-pre1 updates

Merge pull request Qv2ray#971 from Qv2ray/dev

Qv2ray v2.7.0-alpha1

Merge branch 'version-v2' into master

* version-v2: (52 commits)
  fix: refactor and fixed extra cmdline caused preinitialization error
  add: use monospace as log font, fixed Qv2ray#860
  解决更新KDE后SESSION环境变量的问题
  add: added none as a Shadowsocks cipher
  Update nsis.yml
  Update build-qv2ray-cmake.yml
  updating translations
  Update QRCodeHelper.cpp
  do not translate forwarding proxy types
  version: bump version
  fix: fixed language loading algorithm
  fix: workaround of macOS SingleApplication problem
  debian: bump version
  debian: add missing dependencies
  fix: security -> encryption
  fix: fixed Outbound Editor index out of range
  fix: protect libsemver using a try..catch block
  trying to fix the buffer overflow
  trying to save your brains
  cleanup: remove unused slots and functions, resolved Qv2ray#765
  ...

Update Fedora badges again

Update QvProxyConfigurator.cpp

version: bump version

update debian/changelog

zh_CN.ts: typo fix