Add ClideTreeView.

icons/folder_closed.svg

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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   version="1.1"
+   viewBox="-10 0 1792 1792"
+   id="svg51"
+   sodipodi:docname="folder_closed.svg"
+   width="1792"
+   height="1792"
+   inkscape:version="1.1.2 (0a00cf5339, 2022-02-04)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs55" />
+  <sodipodi:namedview
+     id="namedview53"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     showgrid="false"
+     inkscape:zoom="0.45033482"
+     inkscape:cx="842.70632"
+     inkscape:cy="896"
+     inkscape:window-width="1846"
+     inkscape:window-height="1016"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg51" />
+  <path
+     fill="currentColor"
+     d="m 1718,672 v 704 q 0,92 -66,158 -66,66 -158,66 H 278 q -92,0 -158,-66 -66,-66 -66,-158 V 416 q 0,-92 66,-158 66,-66 158,-66 h 320 q 92,0 158,66 66,66 66,158 v 32 h 672 q 92,0 158,66 66,66 66,158 z"
+     id="path49" />
+</svg>

icons/folder_open.svg

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   version="1.1"
+   viewBox="-10 0 1792 1792"
+   id="svg139"
+   sodipodi:docname="folder_open.svg"
+   width="1792"
+   height="1792"
+   inkscape:version="1.1.2 (0a00cf5339, 2022-02-04)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs143" />
+  <sodipodi:namedview
+     id="namedview141"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     showgrid="false"
+     inkscape:zoom="0.24358259"
+     inkscape:cx="149.84651"
+     inkscape:cy="1098.1901"
+     inkscape:window-width="1846"
+     inkscape:window-height="1016"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg139" />
+  <path
+     fill="currentColor"
+     d="M 1590,1376 V 672 q 0,-40 -28,-68 -28,-28 -68,-28 H 790 q -40,0 -68,-28 -28,-28 -28,-68 v -64 q 0,-40 -28,-68 -28,-28 -68,-28 H 278 q -40,0 -68,28 -28,28 -28,68 v 960 q 0,40 28,68 28,28 68,28 h 1216 q 40,0 68,-28 28,-28 28,-68 z m 128,-704 v 704 q 0,92 -66,158 -66,66 -158,66 H 278 q -92,0 -158,-66 -66,-66 -66,-158 V 416 q 0,-92 66,-158 66,-66 158,-66 h 320 q 92,0 158,66 66,66 66,158 v 32 h 672 q 92,0 158,66 66,66 66,158 z"
+     id="path137" />
+</svg>

icons/generic_file.svg

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   version="1.1"
+   viewBox="-10 0 1792 1792"
+   id="svg147"
+   sodipodi:docname="generic_file.svg"
+   width="1792"
+   height="1792"
+   inkscape:version="1.1.2 (0a00cf5339, 2022-02-04)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs151" />
+  <sodipodi:namedview
+     id="namedview149"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     showgrid="false"
+     inkscape:zoom="0.12179129"
+     inkscape:cx="-578.85911"
+     inkscape:cy="1687.3127"
+     inkscape:window-width="1846"
+     inkscape:window-height="1016"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg147" />
+  <path
+     fill="currentColor"
+     d="m 1586,476 q 14,14 28,36 H 1142 V 40 q 22,14 36,28 z m -476,164 h 544 v 1056 q 0,40 -28,68 -28,28 -68,28 H 214 q -40,0 -68,-28 -28,-28 -28,-68 V 96 Q 118,56 146,28 174,0 214,0 h 800 v 544 q 0,40 28,68 28,28 68,28 z m 160,736 v -64 q 0,-14 -9,-23 -9,-9 -23,-9 H 534 q -14,0 -23,9 -9,9 -9,23 v 64 q 0,14 9,23 9,9 23,9 h 704 q 14,0 23,-9 9,-9 9,-23 z m 0,-256 v -64 q 0,-14 -9,-23 -9,-9 -23,-9 H 534 q -14,0 -23,9 -9,9 -9,23 v 64 q 0,14 9,23 9,9 23,9 h 704 q 14,0 23,-9 9,-9 9,-23 z m 0,-256 v -64 q 0,-14 -9,-23 -9,-9 -23,-9 H 534 q -14,0 -23,9 -9,9 -9,23 v 64 q 0,14 9,23 9,9 23,9 h 704 q 14,0 23,-9 9,-9 9,-23 z"
+     id="path145" />
+</svg>