Version 2.10: add key inputs to draw rectangle, trendline, text and fibonacci retracement.

Version 2.0:
- Add 5 charts to sync objects (total: 20 charts).
- ESC Key: deselect all objects.
- G Key: enable select rectangles by clicking their fill (you need press G whenever you want to select rectangle by clicking its fill, one click one rectangle and disable by click anywhere on chart).
- E Key: show colors buttons, remove BG fill button, delete rectangle button, mark new name button for rectangle.
+ Delete rectangle button: when you click it, rectangle will be deleted and the chart shows you a button to sync deleting rectangle. That button named "Sync Rectangle" (the rectangles of other sync charts will be deleted when you click this button).
+ Mark new name button: when you don't want to sync a rectangle, you can mark it as new. This indicator will understand it is a new rectangle. And it will not be synchronized with old rectangles in other charts. (You can click sync objects button with this new rectangle, other charts will create new rectangles).

Version 1.90: add some input to edit sync objects button properties.

Version 1.80: add some colors and remove fill color buttons when you click rectangles

Version 1.70: fix sync lines of rectangles

Version 1.60:
- Add 5 charts to sync objects (now 10 charts).
- Fix: chart has same index with current chart will be ignored when you sync objects.
- Press U key: now extends rectangles to last bar + 1 (if hourly chart, it will be extended to next hour).
- Fix: sync fill color of rectangle.

Version 1.50:
- Hide objects belong other symbols have been drawn by this indicator.
- Sync selected objects when you click Sync Objects button:
+ Enable sync button in input.
+ Set indexes of chart you want to sync (First chart index is 1. Next chart index is 2, ...)

Add 5 colors input for select the color rectangle after creating it.

Add function to key U for extend all Rectangles drawn by this indicator to last bar

When the rectangle drawn by indicator has been changed, the lines of it will be changed

When the rectangle has been deleted, the lines of rectangle will be deleted.