fix: cap undo history, fix btoa unicode crash, add quota fallback (#352)#353

pradeeban merged 2 commits intoControlCore-Project:devControlCore-Project/concore-editor:devfrom

avinxshKD:fix/undo-history-btoa-quotaavinxshKD/concore-editor:fix/undo-history-btoa-quotaCopy head branch name to clipboard