diff --git a/icons/design/smoking-off.design b/icons/design/smoking-off.design
index 0309d6093..b185da734 100644
Binary files a/icons/design/smoking-off.design and b/icons/design/smoking-off.design differ
diff --git a/icons/design/smoking.design b/icons/design/smoking.design
index bcdb3d74c..23699a5ab 100644
Binary files a/icons/design/smoking.design and b/icons/design/smoking.design differ
diff --git a/icons/design/square-root.design b/icons/design/square-root.design
new file mode 100644
index 000000000..b277960c6
Binary files /dev/null and b/icons/design/square-root.design differ
diff --git a/icons/svg/smoking-off.svg b/icons/svg/smoking-off.svg
index ab25be2d2..de8100190 100644
--- a/icons/svg/smoking-off.svg
+++ b/icons/svg/smoking-off.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" baseProfile="full" width="24" height="24" viewBox="0 0 24.00 24.00" enable-background="new 0 0 24.00 24.00" xml:space="preserve">
-	<path fill="#000000" fill-opacity="1" stroke-linejoin="round" d="M 15.824,14L 19.824,18L 22,18L 22,14M 2,18L 5,18L 5,14L 2,14M 3.277,4L 2,5.268L 4.443,7.711C 2.931,8.611 2.003,10.24 2,12L 4,12C 4,10.756 4.767,9.641 5.929,9.197L 10.732,14L 7,14L 7,18L 14.732,18L 18.732,22L 20,20.723M 10,3L 10,4C 9.998,5.092 9.403,6.096 8.447,6.623L 9.894,8.07C 11.213,7.134 11.998,5.617 12,4L 12,3L 10,3 Z "/>
+	<path fill="#000000" fill-opacity="1" stroke-width="1.33333" stroke-linejoin="miter" d="M 2,6L 8.99,13L 2,13L 2,16L 11.99,16L 18.99,23L 20.25,21.75L 3.25,4.75L 2,6 Z M 20.5,13L 22,13L 22,16L 20.5,16L 20.5,13 Z M 18,13L 19.5,13L 19.5,16L 18,16L 18,13 Z M 18.85,4.88C 19.47,4.27 19.85,3.43 19.85,2.5L 18.35,2.5C 18.35,3.52 17.52,4.35 16.5,4.35L 16.5,5.85C 18.74,5.85 20.5,7.68 20.5,9.92L 20.5,12L 22,12L 22,9.92C 22,7.69 20.72,5.77 18.85,4.88 Z M 14.5,8.7L 16.03,8.7C 17.08,8.7 18,9.44 18,10.75L 18,12L 19.5,12L 19.5,10.41C 19.5,8.61 17.9,7.25 16.03,7.25L 14.5,7.25C 13.48,7.25 12.65,6.27 12.65,5.25C 12.65,4.23 13.48,3.5 14.5,3.5L 14.5,2C 12.65,2 11.15,3.5 11.15,5.35C 11.15,7.2 12.65,8.7 14.5,8.7 Z M 17,15.93L 17,13L 14.07,13L 17,15.93 Z "/>
 </svg>
diff --git a/icons/svg/smoking.svg b/icons/svg/smoking.svg
index 1452d0618..dcc9be602 100644
--- a/icons/svg/smoking.svg
+++ b/icons/svg/smoking.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" baseProfile="full" width="24" height="24" viewBox="0 0 24.00 24.00" enable-background="new 0 0 24.00 24.00" xml:space="preserve">
-	<path fill="#000000" fill-opacity="1" stroke-linejoin="round" d="M 7,19L 22,19L 22,15L 7,15M 2.00001,19L 5,19L 5,15L 2.00001,15M 10,4L 10,5C 10,6.657 8.657,8 7,8C 4.239,8 2.00001,10.239 2.00001,13L 4,13C 4,11.343 5.343,10 7,10C 9.761,10 12,7.761 12,5L 12,4L 10,4 Z "/>
+	<path fill="#000000" fill-opacity="1" stroke-width="1.33333" stroke-linejoin="miter" d="M 2,16L 17,16L 17,19L 2,19L 2,16 Z M 20.5,16L 22,16L 22,19L 20.5,19L 20.5,16 Z M 18,16L 19.5,16L 19.5,19L 18,19L 18,16 Z M 18.85,7.73C 19.47,7.12 19.85,6.28 19.85,5.35C 19.85,3.5 18.35,2 16.5,2L 16.5,3.5C 17.52,3.5 18.35,4.33 18.35,5.35C 18.35,6.37 17.52,7.2 16.5,7.2L 16.5,8.7C 18.74,8.7 20.5,10.53 20.5,12.77L 20.5,15L 22,15L 22,12.76C 22,10.54 20.72,8.62 18.85,7.73 Z M 16.03,10.2L 14.5,10.2C 13.48,10.2 12.65,9.22 12.65,8.2C 12.65,7.18 13.48,6.45 14.5,6.45L 14.5,4.95C 12.65,4.95 11.15,6.45 11.15,8.3C 11.15,10.15 12.65,11.65 14.5,11.65L 16.03,11.65C 17.08,11.65 18,12.39 18,13.7L 18,15L 19.5,15L 19.5,13.36C 19.5,11.55 17.9,10.2 16.03,10.2 Z "/>
 </svg>
diff --git a/icons/svg/square-root.svg b/icons/svg/square-root.svg
new file mode 100644
index 000000000..25186a662
--- /dev/null
+++ b/icons/svg/square-root.svg
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" baseProfile="full" width="24" height="24" viewBox="0 0 24.00 24.00" enable-background="new 0 0 24.00 24.00" xml:space="preserve">
+	<path fill="#000000" fill-opacity="1" stroke-linejoin="round" d="M 11.7574,16.8284L 14.5858,14L 11.7574,11.1716L 13.1716,9.75736L 16,12.5858L 18.8284,9.75736L 20.2426,11.1716L 17.4142,14L 20.2426,16.8284L 18.8284,18.2426L 16,15.4142L 13.1716,18.2426L 11.7574,16.8284 Z M 2,11L 5,11L 5,11.019L 5.00696,11.016L 7.29156,16.3982L 10,6.00001L 22,6L 22,8L 11.5458,8L 8.6806,19L 6.22324,19L 3.67639,13L 2,13L 2,11 Z "/>
+</svg>