Update for issue processwire/processwire-issues#14 to update CSS for long description or notes that have no spaces (like URLs or emails) so that they wrap rather than overflow.

wire/modules/AdminTheme/AdminThemeDefault/styles/sass/_mixins.scss

@@ -15,3 +15,12 @@
 	background: linear-gradient(top, $top 0%, $bottom 100%); /* W3C */
 }
 
+@mixin word-wrap() {
+	overflow-wrap: break-word;
+	word-break: break-word;
+	word-wrap: break-word;
+	-webkit-hyphens: auto;
+	-moz-hyphens: auto;
+	hyphens: auto;
+}
+

wire/modules/AdminTheme/AdminThemeDefault/styles/sass/main.scss

@@ -97,6 +97,8 @@ code {
 .description {
 	color: $medium-text-color; 
 	margin: 0.5em 0;
+	@include word-wrap();
+	
 }
 
 .notes, 
@@ -107,6 +109,7 @@ code {
 }
 .notes {
 	background: $notes-bg; 
+	@include word-wrap();
 }
 
 .description strong,

wire/modules/AdminTheme/AdminThemeReno/styles/_common.scss

@@ -22,6 +22,15 @@ $mainnav-width: 210px;
 $mainnav-width-wide: 230px; // bigger sidebar for wide screen?
 $masthead-height: 52px;
 
+@mixin word-wrap() {
+	overflow-wrap: break-word;
+	word-break: break-word;
+	word-wrap: break-word;
+	-webkit-hyphens: auto;
+	-moz-hyphens: auto;
+	hyphens: auto;
+}
+
 @import 'reset';
 @import 'jquery-ui';
 @import 'ui';
@@ -832,6 +841,10 @@ ul.action-group{
 .notes {
 	background: $notes-bg;
 }
+.description,
+.notes {
+	@include word-wrap();
+}
 
 .description strong,
 .notes strong {