In xterm when I hit fn/sym and bring up the extra symbols...I have 4 rows. I noticed when I tap on any of the symbols in rows 1,2 and 4 it inputs the symbol and leaves the symbol screen. but on row three if I click a symbol it just highlights in blue that symbol. on row 3 it requires a double click to input the symbol. Is there a reason for this? and is it just me?