Various bug fixes and small features (#606)

* Fix stray cursor, integer overflows and other bugs

* check for getenvlist error, shorten code

* fix cascade, set info_line before auth, make code clearer and a bug fix

* Add option to turn on numlock at startup

* Fix setting numlock

* Update build.zig

* Custom info text

* Shift+Tab for previous input

* update changelog and res/config

* Some fixes

* update build.zig

* update build.zig again

* Fix xauth command for some shells and fix building in ReleaseSafe

* Use git describe to get dev version str

* revert change to getLockState (it broke the doom animation)

* add new ly error messages. Only try to make path for pam/exe during install when dest_directory is defined + print warning on error.

* add warning message for workaround

src/tui/components/InfoLine.zig

@@ -1,4 +1,6 @@
+const std = @import("std");
 const utils = @import("../utils.zig");
+const TerminalBuffer = @import("../TerminalBuffer.zig");
 
 const InfoLine = @This();
 
@@ -9,3 +11,23 @@ pub fn setText(self: *InfoLine, text: []const u8) !void {
     self.width = if (text.len > 0) try utils.strWidth(text) else 0;
     self.text = text;
 }
+
+pub fn draw(self: InfoLine, buffer: TerminalBuffer) void {
+    if (self.width > 0 and buffer.box_width > self.width) {
+        const label_y = buffer.box_y + buffer.margin_box_v;
+        const x = buffer.box_x + ((buffer.box_width - self.width) / 2);
+
+        buffer.drawLabel(self.text, x, label_y);
+    }
+}
+
+pub fn clearRendered(allocator: std.mem.Allocator, buffer: TerminalBuffer) !void {
+    // draw over the area
+    const y = buffer.box_y + buffer.margin_box_v;
+    const spaces = try allocator.alloc(u8, buffer.box_width);
+    defer allocator.free(spaces);
+
+    @memset(spaces, ' ');
+
+    buffer.drawLabel(spaces, buffer.box_x, y);
+}