[Audio Encoder]      added needed ConvertAudioToFloat() for AviSynth+


git-svn-id: http://svn.code.sf.net/p/megui/code@2475 a21b8521-4df1-4ed3-b48c-cff5bc73dcb3
[Queue]              removed general check for missing packages at queue start
[Update]             automatically download needed and missing packages after confirmation if the package was disabled (regression of 2471)


git-svn-id: http://svn.code.sf.net/p/megui/code@2476 a21b8521-4df1-4ed3-b48c-cff5bc73dcb3
[Update]             fixed sometimes not possible to enable packages
[Update]             improved default update selection logic
[Update]             fixed sometimes not processing all packages


git-svn-id: http://svn.code.sf.net/p/megui/code@2477 a21b8521-4df1-4ed3-b48c-cff5bc73dcb3