Reflow bug with indent type "tabs" and tab width over 1

[slowpeek]

Relevant settings:

• long line marker = 72, enabled
• indent type = tabs
• tab width = 8
• geany 1.37.1

I noticed C-j sometimes does nothing even though a line is well over the long line marker but adding some more chars to the line occasionally makes it work.

Reproduce (with the setting from above):

• open new doc
• insert 8 tabs
• insert "a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a"
• notice the cursor position is 127, but if you select everything it shows "sel: 71" in the status area
• press C-j and notice nothing changes
• insert a space
• press C-j and notice it got reflowed nicely taking indentation into account.

To me the culprit is the following piece since it doesn't take tab width into account

geany/src/keybindings.c

Lines 2297 to 2302 in 41624c4

	/* if this line is short enough, do nothing */
	if (column > sci_get_line_end_position(editor->sci, start) -
	sci_get_position_from_line(editor->sci, start))
	{
	return;
	}

[elextr]

If somebody made a PR using sci_get_col_from_position() instead of just using the byte positions its likely to get accepted.