10/UI/Symbol/Glyph add owner, presenter, location, date; update calendar

[catenglaender]

Issue

While working on the OpenCast plugin, the team noticed the need for some more Glyphs. We believe that these glyphs are a useful addition to ILIAS in general and should be available in the core.

These are the designs of the new/updated glyphs:

We wish to merge these with release_10 so the OpenCast plugin being actively developed for ILIAS 10 can make good use of these icons. They help to make the interface less crowded and core functionality and information easier to find.

Additions

• Date for functionality related to a single day (e.g. "jump to today")
• Owner for functionality marking or setting an ownership role
• Presenter for functionality marking the role or user responsibility of presenting a piece of content
• Location for functionality related to a specific location (e.g. "pin coordinates on a map", "select location")

Updates

• Calendar Glyph has been updated to follow the current design guidelines of the il-icons font and visually fit to the new Date Glyph
• Existing Factory Documentation has been updated to specify the source of the Glyphs. This should make it easier for future frontend developers to troubleshoot, refactor and extend the Glyph library. We have the following four cases:
  • The glyph's design is rendered using the il-icons font and is based on the simplelineicons font.
  • The glyph's design is rendered using the Glyphicons-Halflings font which originated from Bootstrap 3 (deprecated symbol source).
  • The design rendered is from the Open Sans Emoji font.
  • The glyph's design is rendered using the il-icons font and was created by the community.

Beware: Binary files

Font files cannot be merged dynamically by git. If other modifications to the il-icon font files took place since this PR was made these will be overridden.

Outlook

The team recommends moving all Glyphs currently using the Glyphicons-Halflings and the Open Sans Emoji font to their equivalent in the simplelineicons font or to designs created by the community emulating the same look. This way ILIAS will be more visually coherent.

The CSS authorities are discussing moving from icon fonts to single SVGs which would make the hassle of carefully managing and modifying the font files obsolete.