fixup! Bug 31286: Implementation of bridge, proxy, and firewall settings in...

fixup! Bug 31286: Implementation of bridge, proxy, and firewall settings in about:preferences#connection

Bug 42696: Update the tor bridge provider mail icon.

browser/components/torpreferences/content/mail.svg

+<svg width="16" height="16" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg">
+  <path fill-rule="evenodd" d="M13 2.5H3C1.89543 2.5 1 3.39543 1 4.5V11.5C1 12.6046 1.89543 13.5 3 13.5H13C14.1046 13.5 15 12.6046 15 11.5V4.5C15 3.39543 14.1046 2.5 13 2.5ZM12.8023 3.75H3.19766L7.7466 7.91986C7.88997 8.05129 8.11003 8.05129 8.2534 7.91986L12.8023 3.75ZM2.25 4.57702V11.5C2.25 11.9142 2.58579 12.25 3 12.25H13C13.4142 12.25 13.75 11.9142 13.75 11.5V4.57702L9.09805 8.84131C8.47678 9.41081 7.52322 9.41081 6.90195 8.84131L2.25 4.57702Z" fill="context-fill" />
+</svg>

browser/components/torpreferences/content/torPreferences.css

@@ -752,7 +752,7 @@ button.spoof-button-disabled {
 }
 
 #tor-bridges-provider-icon-email {
-  content: url("chrome://browser/skin/mail.svg");
+  content: url("chrome://browser/content/torpreferences/mail.svg");
 }
 
 .tor-bridges-provider-name {

browser/components/torpreferences/jar.mn

@@ -19,6 +19,7 @@ browser.jar:
     content/browser/torpreferences/connectionSettingsDialog.js       (content/connectionSettingsDialog.js)
     content/browser/torpreferences/network.svg                       (content/network.svg)
     content/browser/torpreferences/network-broken.svg                (content/network-broken.svg)
+    content/browser/torpreferences/mail.svg                          (content/mail.svg)
     content/browser/torpreferences/provideBridgeDialog.xhtml         (content/provideBridgeDialog.xhtml)
     content/browser/torpreferences/provideBridgeDialog.js            (content/provideBridgeDialog.js)
     content/browser/torpreferences/requestBridgeDialog.xhtml         (content/requestBridgeDialog.xhtml)