Add an advanced pref for vertical bar cursor width.

Issue 5961

sources/iTermAdvancedSettingsModel.h

@@ -192,5 +192,6 @@
 + (BOOL)preventEscapeSequenceFromClearingHistory;
 + (BOOL)dwcLineCache;
 + (BOOL)lowFiCombiningMarks;
++ (CGFloat)verticalBarCursorWidth;
 @end

sources/iTermAdvancedSettingsModel.m

@@ -131,6 +131,7 @@ DEFINE_BOOL(zeroWidthSpaceAdvancesCursor, YES, @"Terminal: Zero-Width Space (U+2
 DEFINE_BOOL(fullHeightCursor, NO, @"Terminal: Cursor occupies line spacing area.\nIf lines have more than 100% vertical spacing and this setting is enabled the bottom of the cursor will be aligned to the bottom of the spacing area.");
 DEFINE_FLOAT(underlineCursorOffset, 0, @"Terminal: Vertical offset for underline cursor.\nPositive values move it up, negative values move it down.");
 DEFINE_BOOL(preventEscapeSequenceFromClearingHistory, NO, @"Terminal: Prevent CSI 3 J from clearing scrollback history?\nThis is also known as thethe terminfo E3 capability.");
+DEFINE_FLOAT(verticalBarCursorWidth, 1, @"Terminal: Width of vertical bar cursor.");
 #pragma mark Hotkey
 DEFINE_FLOAT(hotkeyTermAnimationDuration, 0.25, @"Hotkey: Duration in seconds of the hotkey window animation.\nWarning: reducing this value may cause problems if you have multiple displays.");

sources/iTermCursor.m

@@ -109,7 +109,7 @@
              focused:(BOOL)focused
                coord:(VT100GridCoord)coord
              outline:(BOOL)outline {
-    NSRect cursorRect = NSMakeRect(rect.origin.x, rect.origin.y, 1, rect.size.height);
+    NSRect cursorRect = NSMakeRect(rect.origin.x, rect.origin.y, [iTermAdvancedSettingsModel verticalBarCursorWidth], rect.size.height);
     if (outline) {
         [self drawOutlineOfRect:cursorRect withColor:backgroundColor];
     } else {