various canvas fixes

[AlexMitchellMus]

• fix IEM labels not updating correctly when changed (canvas used PD label text- which could change 'after' the label has been set via message snooping)
  ⚠️ Label updates has a jitter, so they don't update consistently, when they are being updated at a fixed rate (60hz etc), looks like this may come from the snooping system itself?
• fix connection display not showing extended characters (don't use monospace) show how many items are in a list for connection display
• fix moving objects reading PD bounds 'as they are being dragged'

with fix:

Peek.2023-09-17.21-01.mp4

without fix:

Peek.2023-09-17.21-03.mp4

Test patch (from @tomara-x) :

#N canvas 827 239 527 327 12;
#X msg -513 396 label \$1, f 17;
#X obj -513 438 bng 127 250 50 0 empty empty ☢️ 75 81 0 32 #181818 #181818 #ffea00;
#X obj -513 114 t b f b, f 16;
#X msg -513 246 adddollar \$1, f 21;
#X msg -513 296 set symbol, f 20;
#X msg -513 164 list 👻 🧵 🪡 🦋 🦀 🐐 🍀 🍄 🌕 🌖 🌗 🌘 🌑 🌒 🌓 🌔 🌟 💧 🎷 🎲 🚁 🐭 🔪 🪞 🧿 🧹 🩸 🪱 🧸 💜 ☮ 🆘 🆒 🆓 🖤 ⚧ ☢️ ☣️ 🦊 💎 🐶 🦝 🔮 🦈 🌸 🍑 🥦 🦗 🦐 🍤 🐛 🐠 🫧 🤍 🐸 🐍 🌊 🍡 🍠 🍥 🍙 🍰 🌠 🦞 🪸 🐞 🪲 🐌 🕊 🌿 🎱 🐳 💕 💋 🍧 🥥 ☄️ ☀️ 🐜 🦑 🪓 🕸 🧭 🎑 🌅 🌄 🌠 🎇 🎆 🌇 🌆 🌃 🌌 🌉 🌁, f 99;
#X obj -513 14 metro 1 60 persec, f 25;
#X obj -513 64 count 1 95, f 19;
#X obj -513 -62 tgl 46 0 empty empty empty 17 7 0 10 #191919 #d4d4d4 #d4d4d4 0 1;
#X msg -513 346 symbol \$37, f 12;
#X connect 0 0 1 0;
#X connect 2 0 5 0;
#X connect 2 1 3 0;
#X connect 2 2 4 0;
#X connect 3 0 9 0;
#X connect 4 0 9 0;
#X connect 5 0 9 0;
#X connect 6 0 7 0;
#X connect 7 0 2 0;
#X connect 8 0 6 0;
#X connect 9 0 0 0;