Improve feedback when reloading css

[Darxo]

Currently the only feedback I know about when reloading css is:

• the changed rules work and I can visibly see something change
• in the dev console there is the line Reloading all CSS files printed

However if nothing changes then I always have to have the console open to confirm that the reload happened at all.
And if the console is full of those Reloading all CSS files then I need to start scrolling and count the amount of those strings. Or I print something else in between

Proposal 1

Implement some consistent visual feedback whenever a CSS/JS reload completed.
e.g. a popup in one of the corners

Proposal 2

Improve the CSS/JS console logs with a time stamp (including seconds). That way I can consistently use the console to confirm this