Improving docs for image sequences

Updating deploy script to allow for partial deployments (i.e. if only…

… some of our repos change between releases)

Adding themes folder to mac build script, so it's correctly symlinked…

… (no icons are loading on mac for Cosmic Dusk theme)

Adding back in "layers", "markers" to webview changes - since we acci…

…dentally filtered them out.

Deep refactor of the QShortcut code used for arrow key detection, wit…

…h a custom eventFilter to stop it from messing with our primary UI tabs (effects, transitions, files, emojis)

Merge pull request #5027 from OpenShot/windows-auto-uninstall

Windows Installer (AppID + App DisplayName)

Bumping version to 2.6.1, min libopenshot version to 0.2.7 (SO 21)

Adding check for empty $REQUEST_UUID on Mac builds

Merge pull request #3263 from OpenShot/release-20200229

Release branch for openshot-qt 2.5.1 (required libopenshot version 0.2.5)

Merge pull request #3161 from OpenShot/release-20200105

Release of openshot-qt 2.5.0 (min libopenshot version: 0.2.4)