DCA improvement and bug fixes

[RezaeiDoust]

1. If user zooms into the plot and try to adjust things in the zoomed state and makes any change in the “property editor”, it zooms out to original state.
2. In “property editor” a. “Time Selection”, both “From” and “To” need to have a text input field to be able to enter a year or a date. b. In “Decline Curve”, it would be good to have a slider for the “years”.
3. Curves in the history part must be backward extrapolation of the same curve and not the exact history values which does not make technical sense.
4. Equations should be always visible to the user with possibility of Export.
5. Definition of curve should have two options: a. (As it is now) by keeping only the start- and end- point and matching the equation to them. b. Regression of the history section to the equation.
6. When three curves are made, they are always the same color and same also as the original one, it makes it very hard to use before a change in color is performed.
7. Link “DCA” to decline curve analysis in help. Also equation is not visible ( now it is within Origins link in DCA )