Atelier enable drag and drop
Summary:
- Split openFile into openActcionTriggered() and loadFile(const QUrl &)
- Let the Open Dialog Open N files
- Enable Drag and drop for gcode and gco files
Test Plan:
DnD files to open them.
Known Issues:
- Can not drop on GCodeEditor
Reviewers: laysrodrigues, patrickelectric, tcanabrava
Reviewed By: laysrodrigues, patrickelectric
Subscribers: Atelier: General Development
Tags: Atelier: General Development
Differential Revision: https://phabricator.kde.org/D12719