feat(FEC-9282): player support for side panels

[esakal]

Description of the Changes

• Add player areas (player, gui, video, interactive, bars and side panels)
• Calculate the area's size and keep in the store

Solves FEC-9282

CheckLists

• changes have been done against master branch, and PR does not conflict
• new unit / functional tests have been added (whenever applicable)
• test are passing in local environment
• Travis tests are passing (or test results are not worse than on master branch :))
• Docs have been updated

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This change is 

[yairans]

Reviewed 1 of 20 files at r22, 7 of 19 files at r26, 11 of 15 files at r27, 11 of 11 files at r28, 1 of 1 files at r29.
Reviewable status: all files reviewed, 3 unresolved discussions (waiting on @esakal)

[yairans]

Reviewable status: all files reviewed, 7 unresolved discussions (waiting on @esakal)

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src/components/player-area/player-area.js, line 124 at r29 (raw file):

    const {activePresetName, name: playerAreaName} = this.props;

    if (!playerAreaComponents) {

should be
if (playerAreaComponents.length < 1)
and move to top

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src/components/player-area/player-area-provider.js, line 46 at r29 (raw file):

    let shouldTriggerListeners = false;
    (this.props.uiComponents || []).forEach(componentData => {
      const componentAdded = !!this._addNewComponent(componentData);

whencomponentAdded false?

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src/components/player-area/player-area-provider.js, line 120 at r29 (raw file):

   * @private
   */
  _addNewComponent = (componentData, shouldUpdateImmediately) => {

shouldUpdateImmediately seems like no one pass it

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src/components/player-area/player-area-provider.js, line 276 at r29 (raw file):

        listen: this._listen,
        addNewComponent: this._addNewComponentAndUpdateListeners,
        getAreaComponents: this._getAreaComponents

who is using addNewComponent and getAreaComponents ?

[yairans]

Reviewable status: all files reviewed, 8 unresolved discussions (waiting on @esakal)

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src/components/player-area/player-area.js, line 113 at r29 (raw file):

    this.props.logger.debug(`Player area '${playerAreaName}' in preset '${activePresetName}' - register to changes`);

    this._unregisterListenerCallback = this.context.playerAreaComponentsStore.listen(activePresetName, playerAreaName, this._updateAreaComponents);

better to expose playerAreaComponentsStore.unlisten

[yairans]

Reviewable status: all files reviewed, 9 unresolved discussions (waiting on @esakal)

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src/components/player-area/player-area-provider.js, line 142 at r29 (raw file):

    });

    return () => {

better to expose removeComponent no? maybe need to add id to the components for this

[yairans]

Reviewed 4 of 5 files at r30, 1 of 1 files at r32.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @esakal)

[yairans]

Reviewed 3 of 3 files at r33.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @esakal)