Shotcut: v20.06.14 Release

In addition to the BETA 1 release notes: - Fixed many problems in the new Proxy feature. - Fixed keyframes for the Level parameter of the Opacity filter. - Fixed drop-framed timecode for 59.94 fps to follow a strict cadence. - Fixed the Reduce Noise: Smart Blur and Reduce Noise: Wavelet video filters to not overwrite the alpha channel. - Fixed the image quality (interpolation) of a Size and Position or Rotate and Scale filter inside of a transition. - Changed Playlist > Sort > By Name to be case insensitive. - Added bigsh0t 360॰ video filters: - 360: Equirectangular Mask - 360: Equirectangular to Rectilinear - 360: Hemispherical to Equirectangular - 360: Rectilinear to Equirectangular - 360: Stabilize - 360: Transform - Improved the performance of image sequences. - Significantly improved the performance of the automatic image padding.