gitk: Use a spinbox for setting tabstop settings
The tabstop must be a smallish positive integer, and a spinbox is the accepted UI control to accomplish this limiting rather than the text entry box previously used. Signed-off-by: Mark Levedahl <mdl123@verizon.net>
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@ -6972,7 +6972,7 @@ proc doprefs {} {
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pack $top.ntag.b $top.ntag.l -side left
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grid x $top.ntag -sticky w
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label $top.tabstopl -text "tabstop" -font optionfont
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entry $top.tabstop -width 10 -textvariable tabstop
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spinbox $top.tabstop -from 1 -to 20 -width 4 -textvariable tabstop
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grid x $top.tabstopl $top.tabstop -sticky w
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label $top.cdisp -text "Colors: press to choose"
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