Qtoggleserver

* core/api: Added support for live introspection API call.
* frontend: Updated Chart.JS library.
* frontend/dashboard: Fixed chart widget error when port is not available.
* frontend/dashboard: Widgets will now wait until value change takes effect.
* frontend/ports: Setting a port value now goes through regardless of currently known value.
* history: Improved background sample removal mechanism.
* persist/postgresql: Fixed desynchronization issue when checking for table existence.
* lib/polled: Fixed losing of polling interval setting.
* Added support for HTTP 202 when setting port values.

version-0.24.0

* frontend/charts: Fixed initial data errors on Pie Chart.
* frontend: Fixed alternating combo item colors.

version-0.24.0-beta.7

* frontend/dashboard: Fixed PieChart widget *Show Total* option.
* frontend/dashboard: Fixed error when reloading panels on window activation.
* frontend/ports: Port ids are now displayed (and searchable) in ports list.

version-0.24.0-beta.6

* frontend/dashboard: Fixed some PieChart total value bugs.
* frontend/dashboard: Fixed panels not reloading on window focus.

version-0.24.0-beta.5

* frontend/dashboard: Fixed caching bugs in Line and Bar Chart widgets.
* frontend/dashboard: Improved Pie Chart widget options for single port.


version-0.24.0-beta.4

* core/history: Improved timestamped samples caching.
* frontend/dashboard: Timestamped history values from future are no longer requested.
* frontend/dashboard: PieChart total & legend are now optional.

version-0.24.0-beta.3