[FL-2430] Automatic Desktop Locking (#1101)

* Add Auto Lock Time setting
* Update .gitignore
* Add value_index toolbox module
* Auto locking basic implementation
* Better AutoLock implementation, edge cases and cleanup
* Fix NULL pointer crash
* Turn off backlight shortly in locked mode
* Re-enable auto lock after pin lock
* Correctly handle start when pin locked
* Use timer to hide locked hint
* Use a single state variable instead of multiple bools
* Do not call update callback recursively
* Allow input when the Unlocked hint is shown
* Add a delay to backlight switch off while locking
* Better user input handling
* Switch backlight off after pin timeout
* Correct grammar in notification settings

Co-authored-by: あく <alleteam@gmail.com>

lib/toolbox/value_index.c

@@ -0,0 +1,39 @@
+#include "value_index.h"
+
+uint8_t value_index_uint32(const uint32_t value, const uint32_t values[], uint8_t values_count) {
+    int64_t last_value = INT64_MIN;
+    uint8_t index = 0;
+    for(uint8_t i = 0; i < values_count; i++) {
+        if((value >= last_value) && (value <= values[i])) {
+            index = i;
+            break;
+        }
+        last_value = values[i];
+    }
+    return index;
+}
+
+uint8_t value_index_float(const float value, const float values[], uint8_t values_count) {
+    const float epsilon = 0.01f;
+    float last_value = values[0];
+    uint8_t index = 0;
+    for(uint8_t i = 0; i < values_count; i++) {
+        if((value >= last_value - epsilon) && (value <= values[i] + epsilon)) {
+            index = i;
+            break;
+        }
+        last_value = values[i];
+    }
+    return index;
+}
+
+uint8_t value_index_bool(const bool value, const bool values[], uint8_t values_count) {
+    uint8_t index = 0;
+    for(uint8_t i = 0; i < values_count; i++) {
+        if(value == values[i]) {
+            index = i;
+            break;
+        }
+    }
+    return index;
+}