Modularization

[JudithBernett]

• Download button; must support #27
  • ComplexHeatmaps
  • ggplots
  • Tables
• Plot options (gear symbol); must take as input a list of names and input values for the pickerInputs or selectInput or selectizeInput #26
• Features to choose from (Marker by Class/name -> pickerInput) #25
• Nested module: Plot + gear icon + download button
• Module for differential marker expression/abundance
• Module for introductory text (heading + info text) #28
• Module for label + bsPopover
• Nested module: tabs consisting of nested modules with plot + gear icon + download button