Change to previous screen using Shift-Tab

Action.c

@@ -305,6 +305,16 @@ static Htop_Reaction actionNextScreen(State* st) {
    return HTOP_REFRESH;
 }
 
+static Htop_Reaction actionPrevScreen(State* st) {
+   Settings* settings = st->settings;
+   settings->ssIndex--;
+   if (settings->ssIndex == -1) {
+      settings->ssIndex = settings->nScreens - 1;
+   }
+   settings->ss = settings->screens[settings->ssIndex];
+   return HTOP_REFRESH;
+}
+
 static Htop_Reaction actionSetAffinity(State* st) {
    if (st->pl->cpuCount == 1)
       return HTOP_OK;
@@ -610,5 +620,6 @@ void Action_setBindings(Htop_Action* keys) {
    keys['c'] = actionTagAllChildren;
    keys['e'] = actionShowEnvScreen;
    keys['\t'] = actionNextScreen;
+   keys[KEY_SHIFT_TAB] = actionPrevScreen;
 }
 

CRT.c

@@ -42,6 +42,7 @@ in the source distribution for its full text.
 #define KEY_WHEELUP KEY_F(20)
 #define KEY_WHEELDOWN KEY_F(21)
 #define KEY_RECLICK KEY_F(22)
+#define KEY_SHIFT_TAB KEY_F(23)
 
 //#link curses
 
@@ -646,12 +647,16 @@ void CRT_init(int delay, int colorScheme) {
       define_key("\033[13~", KEY_F(3));
       define_key("\033[14~", KEY_F(4));
       define_key("\033[17;2~", KEY_F(18));
+      define_key("\033[Z", KEY_SHIFT_TAB);
       char sequence[3] = "\033a";
       for (char c = 'a'; c <= 'z'; c++) {
          sequence[1] = c;
          define_key(sequence, KEY_ALT('A' + (c - 'a')));
       }
    }
+   if (String_startsWith(CRT_termType, "rxvt")) {
+      define_key("\033[Z", KEY_SHIFT_TAB);
+   }
 #ifndef DEBUG
    signal(11, CRT_handleSIGSEGV);
 #endif

CRT.h

@@ -31,6 +31,7 @@ in the source distribution for its full text.
 #define KEY_WHEELUP KEY_F(20)
 #define KEY_WHEELDOWN KEY_F(21)
 #define KEY_RECLICK KEY_F(22)
+#define KEY_SHIFT_TAB KEY_F(23)
 
 //#link curses