New features
- ungroup aplication instances, while keeping them grouped by application
- when ungrouped, display the window titles and allow the customization of their font-size and width
- when ungrouped, optionally have the favorite application icons serve as launchers
- customize the focused application indicator's color and opacity
Bug fixes
- fix icons not showing up immediately when lauching an application
- fix message "g_signal_handler_disconnect: assertion 'handler_id > 0" occurring when destroying an icon
- fix message "st_widget_get_theme_node called on the widget [# StIcon:last-child first-child] which is not in the stage." occurring after disabling the extension
- fix message "[.../dash-to-panel@jderose9.github.com/windowPreview.js 1008]: reference to undefined property 0" occurring when restarting gnome-shell
- fix message "[.../dash-to-panel@jderose9.github.com/taskbar.js 753]: reference to undefined property 0" occurring when restarting gnome-shell
This commit fixes the following JS warnings:
```
Some code accessed the property 'DASH_ITEM_HOVER_TIMEOUT' on the module 'taskbar'.
That property was defined with 'let' or 'const' inside the module. This was
previously supported, but is not correct according to the ES6 standard. Any
symbols to be exported from a module must be defined with 'var'. The property
access will work as previously for the time being, but please fix your code anyway.
```
```
Some code accessed the property 'DASH_ANIMATION_TIME' on the module 'taskbar'.
That property was defined with 'let' or 'const' inside the module. This was
previously supported, but is not correct according to the ES6 standard.
Any symbols to be exported from a module must be defined with 'var'.
The property access will work as previously for the time being, but please fix
your code anyway.
```
Signed-off-by: Alexander Rüedlinger <a.rueedlinger@gmail.com>
