Better symbolic icons

A lot of the old symbolic icons were not very geometric and off
the 16x16 grid. This brings them in line with the GNOME style for
symbolic icons and aligns them to the pixel grid where possible.

icons/mail-sent-symbolic-rtl.svg

@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
 <svg
+   xmlns:osb="http://www.openswatchbook.org/uri/2009/osb"
    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#"
@@ -7,47 +10,103 @@
    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"
+   sodipodi:docname="mail-sent-symbolic-rtl.svg"
+   height="15.973852"
+   id="svg7384"
+   style="enable-background:new"
+   inkscape:version="0.92.4 (5da689c313, 2019-01-14)"
    version="1.1"
-   x="0px"
-   y="0px"
-   width="90.476997"
-   height="57.429001"
-   viewBox="0 0 90.476997 57.429001"
-   enable-background="new 0 0 100 100"
-   xml:space="preserve"
-   id="svg2"
-   inkscape:version="0.48.4 r9939"
-   sodipodi:docname="sent-symbolic.svg"><metadata
-     id="metadata12"><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="defs10" /><sodipodi:namedview
-     pagecolor="#ffffff"
+   width="16.000013">
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+     inkscape:bbox-nodes="true"
+     inkscape:bbox-paths="true"
      bordercolor="#666666"
+     borderlayer="false"
      borderopacity="1"
-     objecttolerance="10"
+     inkscape:current-layer="layer12"
+     inkscape:cx="-52.743642"
+     inkscape:cy="-8.1939732"
      gridtolerance="10"
+     inkscape:guide-bbox="true"
      guidetolerance="10"
-     inkscape:pageopacity="0"
+     id="namedview88"
+     inkscape:object-nodes="false"
+     inkscape:object-paths="false"
+     objecttolerance="10"
+     pagecolor="#333333"
+     inkscape:pageopacity="1"
      inkscape:pageshadow="2"
-     inkscape:window-width="769"
-     inkscape:window-height="480"
-     id="namedview8"
+     showborder="true"
      showgrid="false"
-     fit-margin-top="0"
-     fit-margin-left="0"
-     fit-margin-right="0"
-     fit-margin-bottom="0"
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-     inkscape:cy="27"
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+     inkscape:showpageshadow="true"
+     inkscape:snap-bbox="true"
+     inkscape:snap-bbox-edge-midpoints="true"
+     inkscape:snap-bbox-midpoints="true"
+     inkscape:snap-global="true"
+     inkscape:snap-grids="true"
+     inkscape:snap-nodes="true"
+     inkscape:snap-others="false"
+     inkscape:snap-to-guides="true"
+     inkscape:window-height="1016"
+     inkscape:window-maximized="1"
+     inkscape:window-width="1920"
+     inkscape:window-x="1600"
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+       empcolor="#0800ff"
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+       enabled="true"
+       id="grid4866"
+       opacity="0.16470588"
+       originx="-64"
+       originy="-16.026148"
+       snapvisiblegridlinesonly="true"
+       spacingx="0.25"
+       spacingy="0.25"
+       type="xygrid"
+       visible="true" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata90">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title>Moka Symbolic Icon Theme</dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <title
+     id="title8473">Moka Symbolic Icon Theme</title>
+  <defs
+     id="defs7386">
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+       id="linearGradient5606"
+       osb:paint="solid">
+      <stop
+         id="stop5608"
+         offset="0"
+         style="stop-color:#000000;stop-opacity:1;" />
+    </linearGradient>
+  </defs>
+  <g
+     inkscape:groupmode="layer"
+     id="layer12"
+     inkscape:label="actions"
+     style="display:inline"
+     transform="translate(-305.0002,-201)">
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+       inkscape:connector-curvature="0"
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+       id="path6"
+       sodipodi:nodetypes="ccccccccccccccc"
+       style="fill:#bebebe;fill-opacity:1;stroke:none" />
+  </g>
+</svg>