[cheese] (16 commits) Created branch wip/hans-fixes-master

[David King <davidk src gnome org>]

The branch 'wip/hans-fixes-master' was created.

Summary of new commits:

  ef21f49... Add a capsfilter to the video-source bin
  1f0fe25... Remove extranous csp_post_balance element
  f18ee5f... Fix no-video-after-switching-resolution problem
  6f4127e... Improve error handling in CheeseCamera
  cf493d7... Fix video-source memleak when switching cameras
  e904325... Remove unused GstCameraBinFlags enum
  79c8074... Fix cheese_camera_device_filter_caps warning
  24d84d6... Fix cheese_camera_device_get_best_format memleak
  8a8faca... Simplify returned GstCaps
  8223201... Drop unused preview_caps variable
  da9ad55... Only add videoconvert elements where necessary
  daec944... Do not block the main valve while recording
  606c262... Downscale image for effects-preview pipeline
  6c5c7eb... Fix updating sensitivity of device selection combo
  0cfc97b... Fix assertion failures when taking a photo
  03ba5dc... Make the flash background white