open #159
open #170
Added Cancel button to Messages dialog in DialogService.js;
Important tweaks to layout of messages to allow
bottom-bar to align to bottom in singleton dialog view;
Revised status colors in theme's constants files;
open #159
open #170
CSS, markup and JS test files initially complete;
Templates renamed for consistency;
message-type icons styled;
Added severity constant "alert";
TO-DO: check refactored CSS against mobile,
see what's broken;
open #159
open #170
Restructured overlay size and positioning approach
for better flexibility;
Getting new dialogs and the overlay to
play nicely in mobile context;
open #159
open #170
Properly re-cast model.hint and added model.actionText;
Moved progressText into progress-bar.html;
Tweaks to dialog styles;
Tweaked styles for progress bar;
Normalized various dialog templates markup;
open #159
open #170
Moved classes from _bottom-bar.scss into _layout.scss
and new file _messages.scss;
Removed _bottom-bar.scss;
Revised display behavior of .status.block to show label on
hover;
