Multilevel offcanvas menu
Added .project to gitignore
Restored version to forked 5.2.1
Changed \t to 2 space chars
shorted names for Multilevel Offcanvas
Merge tag 'v5.3.1' into multilevel-offcanvas
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This reverts commit 915fb21fadeba63222dbb45eac6a415e96f17801.

Conflicts:
	doc/includes/off_canvas/examples_offcanvas_multiple_level_markup.html
	doc/includes/off_canvas/examples_offcanvas_multiple_level_rendered.html
	doc/pages/components/offcanvas.html
	js/foundation/foundation.offcanvas.js
	scss/foundation/components/_offcanvas.scss

Conflicts:
	js/foundation/foundation.offcanvas.js
Merged multilevel-offcanvas with v5.3.1 changes
Merge tag 'v5.3.3' into multilevel-offcanvas
Resolves conflict in doc/pages/components/offcanvas.html
RTL support added. Arrow icons correctly positioned.
Fixed version v5.3.1 to v5.3.3
Fixed explanation text offcanvas-multilevel
Fixed Chrome bug in @mixin icon-double-arrows
New settings for back-link offcanvas
Update: New settings for back-link offcanvas
merge conflict
fix conflicts, merge #5348