ReadUniStringLine never called without explicit length

Change-Id: I1811cf798a9e4b9d2704cccb59213034d2dc2626
drop unnecessary tools/string.hxx includes

Change-Id: I2439ed19b554381f80e882aacbac05167622df92
Related: rhbz#1047871 conditional formatting doesn't fit on screen

Change-Id: I886030c056fe802279f9e16c6f85736b0c4587c6