[web] Make button "Delete all" remove only orders from current se… (#49)

- Make button "Delete all" remove only orders from current selected power.
- Reorganize code
- [web] Remove bugged and useless function gameReloaded() from game page.
- This function caused error `engine.getPhaseType is not a function` for
  games with deadlines.
- Move function saveGameToDisk into its own file.
- [web] Add documentation to methods involved in orders management to help understand what happens.
- Move methods getServerOrders() from game GUI component to game engine object.
- Rename method onSetNoOrders to onSetEmptyOrdersSet.
- Rename property in PowerActionsForm: onNoOrders => onPass.
- [web] Update sending orders to send request clearOrders when local orders list is null.

- Renamed local file:
  - components/power_order => power_orders
  - forms/power_actions_form => power_order_creation_form

- Move power orders buttons bar to a separate file:
  - components/power_orders_actions_bar

- [web] Improve messages about local/server defined orders.

1 files changed, 52 insertions, 0 deletions

diff --git a/diplomacy/web/src/gui/components/button.jsx b/diplomacy/web/src/gui/components/button.jsx
new file mode 100644
index 0000000..0d5dadd
--- /dev/null
+++ b/diplomacy/web/src/gui/components/button.jsx
@@ -0,0 +1,52 @@
+import React from "react";
+import PropTypes from "prop-types";
+
+export class Button extends React.Component {
+    /** Bootstrap button.
+     * Bootstrap classes:
+     * - btn
+     * - btn-primary
+     * - mx-1 (margin-left 1px, margin-right 1px)
+     * Props: title (str), onClick (function).
+     * **/
+    // title
+    // onClick
+    // pickEvent = false
+    // large = false
+    // small = false
+
+    constructor(props) {
+        super(props);
+        this.onClick = this.onClick.bind(this);
+    }
+
+    onClick(event) {
+        if (this.props.onClick)
+            this.props.onClick(this.props.pickEvent ? event : null);
+    }
+
+    render() {
+        return (
+            <button
+                className={`btn btn-${this.props.color || 'secondary'}` + (this.props.large ? ' btn-block' : '') + (this.props.small ? ' btn-sm' : '')}
+                disabled={this.props.disabled}
+                onClick={this.onClick}>
+                <strong>{this.props.title}</strong>
+            </button>
+        );
+    }
+}
+
+Button.propTypes = {
+    title: PropTypes.string.isRequired,
+    onClick: PropTypes.func.isRequired,
+    color: PropTypes.string,
+    large: PropTypes.bool,
+    small: PropTypes.bool,
+    pickEvent: PropTypes.bool,
+    disabled: PropTypes.bool
+};
+
+Button.defaultPropTypes = {
+    disabled: false
+};