Complete multi-country data visualizations for multi-country comparison

[jindaln]

Specifications:

-One titled graph generated for each option in the chosen comparison metric (Gender: Male, Female; Division: Worst-performing, Best-performing; etc.)
-Independent axis indices determined by the selected countries (select countries page)
-Dependent axis determined by the selected indicator (skilled birth attendance, birth registration, etc.)

-Each country's bar is their respective color (from the country colors table in backend)
-Bar values labeled
-Axes labeled
-Horizontal bar graphs (Independent axis is y axis, dependent axis is x axis)