Fix issue where last line is not cleared when SIGINT is received

When we close the application using the quit function F10, the last line
is cleared so that on terminals which do not support ALTBUF the last
line is not clobbered. This do not happen when the application exits as
a result of a signal (SIGINT,SIGTERM,SIGQUIT).

Move the logic to clear the last line into the CRT_done function. This
ensures that it will be executed when the CRT_handleSIGTERM is called.

CRT.c

@@ -961,6 +961,11 @@ IGNORE_WCASTQUAL_END
 }
 
 void CRT_done() {
+   attron(CRT_colors[RESET_COLOR]);
+   mvhline(LINES - 1, 0, ' ', COLS);
+   attroff(CRT_colors[RESET_COLOR]);
+   refresh();
+
    curs_set(1);
    endwin();
 

CommandLine.c

@@ -375,11 +375,6 @@ int CommandLine_run(const char* name, int argc, char** argv) {
 
    ScreenManager_run(scr, NULL, NULL);
 
-   attron(CRT_colors[RESET_COLOR]);
-   mvhline(LINES - 1, 0, ' ', COLS);
-   attroff(CRT_colors[RESET_COLOR]);
-   refresh();
-
    Platform_done();
 
    CRT_done();