Clear LineWrap flag when clearing lines using blockSet.

[MatanZ]

This commit resets a row's mLineWrapped flag, if the last column is cleared with spaces.

Without this the flag remains from a previous line after clearing, for example on escape sequence \e[2J.

To see the bug:

1. Open termux (with font large enough for some of the message lines to wrap).
2. run clear ; ls /
3. press ctrl+alt+= to increase font size.

Notice that the some of the ls lines are now not left aligned.

[agnostic-apollo]

Can you provide before and after screenshots showing the issue?

[MatanZ]

Start, 1920x1080 screen, terminal size: 27x40.

Note that the 5th and 7th line are wrapped:

Results of ls before increasing fonts:

Current master: After increasing fonts, 5th and 7th lines spaces wrapped to 6th and 8th lines respectively.

With this commit (after the same process): display as expected.

[agnostic-apollo]

Yeah, I can confirm that there is an issue.