Update icons for new 20px grid

Set viewBox to "2 2 20 20" to trim 2px off each side of our
existing 24px icons, therefore aligning them to the new 20px
grid. All of them had been drawn with large margins, so none
of the graphic is lost.

Bug: T177432
Bug: T190151
Change-Id: Ifaa8c27450cde7ed25d4429bd8aba25bcba3bfcc

modules/ve-math/chem.svg

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
+<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="2 2 20 20">
     <g id="chemistry-flask">
         <path id="flask" d="M9.5 6a.5.5 0 1 0 0 1h.5v2.36l-3.61 5.876c-.38.614-.37 1.338-.046 1.875.324.538.943.89 1.656.89h9c.713 0 1.33-.352 1.654-.89.324-.535.335-1.257-.043-1.872L15 9.358V7h.5a.5.5 0 1 0 0-1h-1a.5.5 0 0 0-.5.5v3a.5.5 0 0 0 .074.262l3.686 6c.202.33.174.606.037.834-.137.227-.402.404-.797.404H8c-.395 0-.66-.178-.8-.406-.136-.228-.165-.503.038-.83a.5.5 0 0 0 .002-.002l3.686-6A.5.5 0 0 0 11 9.5v-3a.5.5 0 0 0-.5-.5z" />
         <path id="liquid" d="M10.568 12.254L8.268 16h8.464l-1.67-2.72c-1.296.227-2.944-.89-4.494-1.026zm.924 1.223a1 1 0 0 1 1 1 1 1 0 0 1-1 1 1 1 0 0 1-1.002-1 1 1 0 0 1 1.002-1z" />

modules/ve-math/math-display-block.svg

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
+<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="2 2 20 20">
     <g id="math-display-default">
         <path id="sigma" d="M 12.609,11.391 10.275186,16.004 15,16 l 0,-1 1,0 0,3 L 7.2711863,18 11,12 7.2711863,7 16,7 l 0,3 -1,0 0,-2 -4.728814,0" />
         <path id="text" d="m 3.5,19 17,0 c 0.277,0 0.5,0.223 0.5,0.5 0,0.277 -0.223,0.5 -0.5,0.5 l -17,0 C 3.223,20 3,19.777 3,19.5 3,19.223 3.223,19 3.5,19 z m 0,-14 17,0 C 20.777,5 21,5.223 21,5.5 21,5.777 20.777,6 20.5,6 L 3.5,6 C 3.223,6 3,5.777 3,5.5 3,5.223 3.223,5 3.5,5 z" />

modules/ve-math/math-display-default.svg

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
+<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="2 2 20 20">
     <g id="math-display-default">
         <path id="sigma" d="M 12.609,11.391 10.275186,16.004 15,16 l 0,-1 1,0 0,3 L 7.2711866,18 11,12 7.2711866,7 16,7 l 0,3 -1,0 0,-2 -4.728814,0" />
         <path id="sum-to" d="m 13,20 c 0,0.552285 -0.447715,1 -1,1 -0.552285,0 -1,-0.447715 -1,-1 0,-0.552285 0.447715,-1 1,-1 0.552285,0 1,0.447715 1,1 z" />

modules/ve-math/math-display-inline.svg

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
+<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="2 2 20 20">
     <g id="math-display-inline">
         <path id="sigma" d="M 11.609,11.391 9.8551551,15.004 13,15 l 0,-1 1,0 0,3 L 7.2710001,17 10,12 7.2710001,8 14,8 l 0,3 -1,0 0,-2 -3.1488449,0" />
         <path id="sum-to" d="m 17,16 c 0,0.552285 -0.447715,1 -1,1 -0.552285,0 -1,-0.447715 -1,-1 0,-0.552285 0.447715,-1 1,-1 0.552285,0 1,0.447715 1,1 z" />

modules/ve-math/math.svg

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
+<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="2 2 20 20">
     <g id="math">
         <path id="sigma" d="M 13.609,11.391 10.004,16.004 16,16 l 0,-1 1,0 0,3 -10,0 5,-6 -5,-6 10,0 0,3 -1,0 0,-2 -6,0 3.609,4.391" />
     </g>