gtk: use language-neutral arrows for resize overlays

[pluiedev]

The meaning of "c" and "r" can be somewhat cryptic to non-native English speakers as it may not be immediately obvious that "c" stands for "columns", and "r" stands for "rows". I propose replacing them with left-right and up-down double-headed arrows that convey the same meaning, but in a truly language-neutral manner.

Related to #2357

[jcollie]

↔ and ↕ are supported in both Cantarell and the new Adwaita fonts so any issues displaying these are on the user for choosing something other than the Gnome defaults.

[tristan957]

What if we just did rows x columns with no extra symbol. This is what Ptyxis does for example

[jcollie]

What if we just did rows x columns with no extra symbol. This is what Ptyxis does for example

Measurements without units? I'd say that's more confusing than not knowing what c and r mean. Sure, you can usually tell from the context but that's extra moments spent thinking about it when we can just include the units and be unambiguous about it.

[pluiedev]

but that's extra moments spent thinking about it when we can just include the units and be unambiguous about it.

This exactly. From an admittedly English-as-a-second-language perspective it always takes me a moment to register what "c" and "r" even mean, and just numbers would make that even worse 😅

[tristan957]

I typically expect GNOME designers to know what they are doing 🤷. GNOME Console also has no units

[pluiedev]

Who knows? Maybe other designers would think of this as a better idea. We were already deviating from the norm per se, and nobody seems to have complained thus far

[tristan957]

Internally I was complaining 😆

[tristan957]

I do think this is an improvement over the previous version due to the mentioned language barrier.