v3.0.0-b.1

• Switched runtime environment to Pyodide
• Feature: selected multiple entities (range) in a list while holding the shift key
• Restructured the LESS/CSS tool chain
• Added ViUR Ignite LESS/CSS
• Added GULP
• Added .editorconfig
• Restructured submodules
• Removed redundant DOM elements
• Cut vi.less into several element oriented files
• vi.less serves as a catalogue file now
• LESS files are structured into different categories, reflecting the PYJS structure
• Added new ViUR icon set and support for embedded SVG icons
• Removed icon sprites
• Removed most of the old Vi CSS styling and reworked it based on classes -- following ViUR Ignite standards
• Removed most inline styling
• Added many customisable variables in configuration/_appconf.less
• Aligned all status changing CSS classes, e.g.: .is-active, .is-collapsed etc.
• Added a global .is-loading animation
• Completely reworked buttons styling and buttons customisation
• Completely reworked widgets styling based on reusable elements such as .item, .popup and .box
• Added .vi- prefix to Vi exclusive stylings
• Completely reworked bones and edit view styling based on ViUR Ignite form elements such as .input, .label, .select etc.
• Completely reworked login styling
• Completely reworked sidebar and sidebar widgets styling
• Completely reworked alert and messages styling
• Completely reworked data tables
• Added and refined many convenience features like better tooltips, larger drop areas, collapsed module list etc.
• Feature: Allow to parametrize context variable prefixes using conf["vi.context.prefix"]
• Feature: Handle frontend_default_visible-parameter for bones also in Hierarchy handler
• Feature: Improved structuring of TreeNodeWidget and TreeLeafWidget for trees
• Feature: Allow for multiple uploads in File.upload action
• Bugfix: Tree edit-action should not both edit and switch parent node