Added bigger green lock icon

resources/icons/lock-green-18.svg

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+
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+   height="18"
+   id="svg2"
+   version="1.1"
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+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:cc="http://creativecommons.org/ns#"
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+       spacingy="0.5"
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+       position="6,28.490961"
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+     id="metadata7">
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+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
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+     style="display:inline"
+     transform="translate(0,-1040.3622)"
+     id="g5403"
+     inkscape:groupmode="layer"
+     inkscape:label="Lock green">
+    <path
+       style="display:inline;fill:none;stroke:#008000;stroke-width:1.2;stroke-linecap:square;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
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+  </g>
+</svg>