bug: text cursor shown at wrong position when typed two-space-width Traditional Chinese Unicode Charactor in comment

text cursor shown at at wrong position when typed two-space-width Traditional Chinese Unicode Charactor in the comments , the charactor occupied 2 space in width , but the cursor only move 1 space , which result in cursor display at middle of charactor shown , or at wrong position then makes the text editing difficult.

please paste these two charactor to IDE for testing , "測試" (means "test" in Trad. Chinese)


Reproduce the issue in the Arduino IDE 1.x comment editor by typing the Traditional Chinese characters "測試". Then locate the cursor-positioning and text-rendering entry points involved; done means the cursor advances across the full character width and no longer appears inside or beside the character incorrectly.

Written by the indexing model from the issue text.