do not show storage/resolver plugins if a plugin of that kind has been
added to the backend
minor update fix
Added undo/redo all commands
Merge branch 'master' of github.com:0003088/libelektra
Revert "remove markdownconverter (licence problems)"

This reverts commit ac96cad322990b027647512890b994d68a5cf934.
Revert "remove markdown dependency"

This reverts commit c25e5eec28a1de05a20d149a3ee6f56254024b1f.
* Added credits to other authors
* Links in PluginInfo are now clickable
Undo all moves to cleanIndex
added menu to newkey toolbar button to allow new array entries
fixed Arrayname not shown in disabled color when creating a new array
entry
added option to include a configuration keyset when adding a plugin to a
backend
* refactored TreeView to make it possible to define behaviour without
	duplicating the code
 *removed ConfigSelector.qml
show included keys when creating the plugin configuration
moved TreeView functions to separate file
moved main functions to separate file
Added all storageplugins to namefilters
Simplified namefilters
Reimplement ErrorDialog
Merge branch 'master' of github.com:0003088/libelektra
refactored error messages to work with the new error dialog