[GUI] Correct proposal large title for being cut when the app window width isn't big enough

[furszy]

Found it while was testing #2626, a small bug that occurs when the app window width isn't big enough to automatically expand the three column grid proposal cards. So the last letter of proposals with large names are being cut.

For example, look at the proposal in the middle:

Before the fix:

After the fix:

[random-zebra]

At some width (such that the grid has still three columns), some proposal may still have the name partially cut (also the vertical scrollbar covers the last column, but no big deal):

Maybe (as suggested) we could add a tooltip for labelPropName.

[furszy]

interesting, it does not happen in macOS. But well, yeah.. added the tooltip text as well 👍 .
it only happen at some specific width when the grid has three columns but not enough space due the card minimum size. Will work on this specific case later on.

[random-zebra]

ACK 4de2338

[Fuzzbawls]

ACK 4de2338

I think that the edge cases surrounding outlier pixel widths are really not worth investing time into right now. If anything, create an issue and mark it for future work, so it can be referenced if/when any users report the issue.