changing structure and add default.jpg

themes/Tokyo-Night/metacity-1/assets/button.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="#808080">
+  <circle cx="12" cy="12" r="12"/>
+</svg>

themes/Tokyo-Night/metacity-1/assets/close.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="#808080">
+  <path d="M17 8.41L15.59 7 12 10.59 8.41 7 7 8.41 10.59 12 7 15.59 8.41 17 12 13.41 15.59 17 17 15.59 13.41 12z"/>
+</svg>

themes/Tokyo-Night/metacity-1/assets/maximize.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="#808080">
+  <path d="m8 8v8h8v-8h-8zm2 2h4v4h-4v-4z"/>
+</svg>

themes/Tokyo-Night/metacity-1/assets/menu.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="#808080">
+  <circle cx="12" cy="12" r="2"/>
+</svg>

themes/Tokyo-Night/metacity-1/assets/minimize.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="#808080">
+  <path d="m8 14h8v2h-8z"/>
+</svg>

themes/Tokyo-Night/metacity-1/assets/shade.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="#808080">
+  <path d="m6 14 1.41 1.41 4.59-4.59 4.59 4.59 1.41-1.41-6-6z"/>
+</svg>

themes/Tokyo-Night/metacity-1/assets/unmaximize.svg

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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="24"
+   height="24"
+   viewBox="0 0 24 24"
+   fill="#808080"
+   version="1.1"
+   id="svg4"
+   sodipodi:docname="unmaximize.svg"
+   inkscape:version="1.0.2 (e86c870879, 2021-01-15)">
+  <metadata
+     id="metadata10">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs8" />
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1368"
+     inkscape:window-height="711"
+     id="namedview6"
+     showgrid="true"
+     inkscape:zoom="1.8487896"
+     inkscape:cx="-63.850129"
+     inkscape:cy="24.233787"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg4">
+    <inkscape:grid
+       type="xygrid"
+       id="grid835" />
+  </sodipodi:namedview>
+  <path
+     d="m 8,8 v 8 h 8 V 8 Z m 2,2 h 4 v 4 h -4 z"
+     id="path2"
+     style="stroke-width:1.33334"
+     sodipodi:nodetypes="cccccccccc" />
+  <path
+     id="path839"
+     style="stroke-width:1.33334"
+     d="M 10 6 L 10 7 L 17 7 L 17 14 L 18 14 L 18 6 L 10 6 z " />
+</svg>

themes/Tokyo-Night/metacity-1/assets/unshade.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="#808080">
+  <path d="m18 10-1.41-1.41-4.59 4.59-4.59-4.59-1.41 1.41l6 6z"/>
+</svg>