Make pause-on-exceptions toggle/tri-state button.

Source/devtools/front_end/sourcesPanel.css

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Anthony Ricaud <rik@webkit.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 13 matching lines @@
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 .scripts-pause-on-exceptions-status-bar-item .glyph {
     -webkit-mask-position: -256px 0;
 }
 
-.scripts-pause-on-exceptions-status-bar-item.toggled-all .glyph {
+.scripts-pause-on-exceptions-status-bar-item.toggled-uncaught .glyph {
     background-color: rgb(66, 129, 235);
 }
 
-.scripts-pause-on-exceptions-status-bar-item.toggled-uncaught .glyph {
+.scripts-pause-on-exceptions-status-bar-item.toggled-all .glyph {
     background-color: purple;
 }
 
 .evaluate-snippet-status-bar-item .glyph {
     -webkit-mask-position: -64px -48px;
 }
 
 .evaluate-snippet-status-bar-item.toggled .glyph {
     background-color: rgb(66, 129, 235);
 }
@@ skipping 191 matching lines @@
     top: 2px;
     right: 17px;
 }
 
 .sources-status-bar .scripts-debugger-show-hide-button {
     margin-top: 1px !important;
     height: 16px !important;
     -webkit-transform: rotate(90deg);
     right: 0 !important;
 }