Don't translate width and height minimum value.

Thanks to xet7 !

client/components/lists/listHeader.jade

@@ -171,7 +171,7 @@ template(name="setListWidthPopup")
 
 template(name="listWidthErrorPopup")
   .list-width-invalid
-    p {{_ 'list-width-error-message'}}
+    p {{_ 'list-width-error-message'}} '>=100'
     button.full.js-back-view(type="submit") {{_ 'cancel'}}
 
 template(name="setListColorPopup")

client/components/swimlanes/swimlaneHeader.jade

@@ -95,7 +95,7 @@ template(name="setSwimlaneHeightPopup")
 
 template(name="swimlaneHeightErrorPopup")
   .swimlane-height-invalid
-    p {{_ 'swimlane-height-error-message'}}
+    p {{_ 'swimlane-height-error-message'}} '>=100'
     button.full.js-back-view(type="submit") {{_ 'cancel'}}
 
 template(name="swimlaneDeletePopup")

imports/i18n/data/en.i18n.json

@@ -88,11 +88,11 @@
   "setListWidthPopup-title": "Set List Width",
   "set-list-width": "Set List Width",
   "set-list-width-value": "List Width (pixels)",
-  "list-width-error-message": "List width must be a positive integer >=100. TODO(mark-i-m): hard-coded constants",
+  "list-width-error-message": "List width must be a positive integer",
   "setSwimlaneHeightPopup-title": "Set Swimlane Height",
   "set-swimlane-height": "Set Swimlane Height",
   "set-swimlane-height-value": "Swimlane Height (pixels)",
-  "swimlane-height-error-message": "Swimlane height must be a positive integer >=100. TODO(mark-i-m): hard-coded constants",
+  "swimlane-height-error-message": "Swimlane height must be a positive integer",
   "add-swimlane": "Add Swimlane",
   "add-subtask": "Add Subtask",
   "add-checklist": "Add Checklist",