* tuiSourceWin.c (tui_show_source_line): New function.

	* tuiSourceWin.c (tui_show_source_line): New function.
	(tuiShowSourceContent): Call it and avoid clearing the window before
	redrawing it.
	(tuiClearAllSourceWinsContent): Remove.
	* tuiSourceWin.h (tuiClearAllSourceWinsContent): Don't declare.
	* tuiWin.h (tuiClearWinFocus, tuiClearWinFocusFrom): Don't declare.
	* tuiWin.c (tuiClearWinFocus, tuiClearWinFocusFrom): Remove.
	(tuiRefreshAll): Don't clear the window.
	(_makeVisibleWithNewHeight): Don't clear locator line.
	(tuiResizeAll): Remove unused locals.
	(_tuiAdjustWinHeights): Likewise.
	(_makeInvisibleAndSetNewHeight): Likewise.
	(_newHeightOk): Likewise.
	* tuiLayout.c (showLayout): Don't clear source windows.
	(tuiSetLayout): Don't clear the window.
	(_initAndMakeWin): Likewise for status line.
	* tuiGeneralWin.c (makeVisible): Don't clear or refresh the window.
	(makeWindow): Likewise.
	(tuiClearWin): Remove.
	* tuiGeneralWin.h (tuiClearWin): Don't declare.