Fix wrong behavior and crashes in fixture manager when deleting fixtures
Engine: Fix windows gobos relative paths

Fix windows build
Updated changelog and added explanation of the previous fix
Documentation: added a new page to describe Channels Properties editing
Fixture Manager: fixed potential crashes when removng fixtures caused by wrong UI state
Webaccess: button state now correctly switch depending on the sent value
Plugins/HID: removed HIDEvent code as overwhelming the events
New fixture: Showtec Dynamic LED v3 (thanks to Sascha Büttner)

New fixture: Kam Powercan TRI54W Slim (thanks to Robert Box)
New fixture: StageTech LeaderScan Roto (thanks to Noel Utter)
Updated Czech translation

Updated Czech translation
Merge pull request #319 from lachmex/master

Updated Czech translation
Fixture Manager: revert ca84df73fe9c4e58568ee23c191d9dab65b01359 to merge PR #298
Merge branch 'master' of github.com:mcallegari/qlcplus
Merge pull request #298 from plugz/master

Fix wrong behavior and crashes in fixture manager when deleting fixtures
Monitor: fixed fixture positioning through the Fixture Item Editor
Engine: fixed MasterTimer (unix) eating 100% CPU

This is a delicate patch to react on system date/time changes when QLC+ is running.
Without this patch, when date changed, MasterTimer thread ate 100% of CPU without
the possibility to fix it on the fly.
This should fix issue number 1 on the Raspberry Pi, that retrieves the system
date from NTP, thus changing the date when QLC+ is already running.
Fix OSX build
Ready to release 4.7.3
Added missing bugfix with credits to changelog