Update keybindings (#76)

* (pomodoro) reset both clocks at once

* quit app by pressing `q` only

* (countdown) enter/esc keybindings

* (timer) enter/esc keybindings

* (pomodoro) enter/esc keybindings

* update footer label

* fix(coundown): don't reset elapsed clock

while skipping editing changes

* fix(clock): order of actions matters for ESC

handling. Set `pause` instead of `initial` mode while toggeling back.

* fix(timer): order of actions matters (ESC key)

* (footer) update order, lowercase standard keys

src/widgets/clock.rs

@@ -74,6 +74,7 @@ pub struct ClockState<T> {
     name: Option<String>,
     initial_value: DurationEx,
     current_value: DurationEx,
+    prev_value: DurationEx,
     tick_value: DurationEx,
     mode: Mode,
     format: Format,
@@ -151,14 +152,18 @@ impl<T> ClockState<T> {
         self.update_format();
     }
 
+    pub fn get_prev_value(&self) -> &DurationEx {
+        &self.prev_value
+    }
+
     pub fn toggle_edit(&mut self) {
         self.mode = match self.mode.clone() {
             Mode::Editable(_, prev) => {
                 let p = *prev;
-                // special cases: Should `Mode` be updated?
-                // 1. `Done` -> `Initial` ?
+                // Update `Mode`
+                // 1. `Done` -> `Pause`
                 if p == Mode::Done && self.current_value.gt(&Duration::ZERO.into()) {
-                    Mode::Initial
+                    Mode::Pause
                 }
                 // 2. `_` -> `Done` ?
                 else if p != Mode::Done && self.current_value.eq(&Duration::ZERO.into()) {
@@ -170,6 +175,8 @@ impl<T> ClockState<T> {
                 }
             }
             mode => {
+                // store prev. value
+                self.prev_value = self.current_value;
                 if self.format <= Format::Ss {
                     Mode::Editable(Time::Seconds, Box::new(mode))
                 } else {
@@ -402,6 +409,7 @@ impl ClockState<Countdown> {
             name: None,
             initial_value: initial_value.into(),
             current_value: current_value.into(),
+            prev_value: current_value.into(),
             tick_value: tick_value.into(),
             mode: if current_value == Duration::ZERO {
                 Mode::Done
@@ -475,6 +483,7 @@ impl ClockState<Timer> {
             name: None,
             initial_value: initial_value.into(),
             current_value: current_value.into(),
+            prev_value: current_value.into(),
             tick_value: tick_value.into(),
             mode: if current_value == initial_value {
                 Mode::Initial