Reduced notification pop-up width

Reduced width of the notification pop-ups so that they are still larger than pre-5.19, but not as large. The size is roughly 25% larger than pre-5.19, which allows for more information to be displayed while at the same time avoiding an extremely large pop-up to be shown. 5.19 shows pop-ups that are more than 50% larger than in previous iterations (units.gridUnit * 28 instead of units.gridUnit * 18), which I deem excessively distracting. With my proposal, there is still more horizontal space to reduce vertical clutter, but not as much as to make notifications invasive and distracting. In the picture you can see the current notification size, the proposed size and the pre-5.19 size compared.