Categorical Select bugfix + Rework of initialization of data dictionary columns for data types

[jarmoza]

This PR addresses both #386 and #390. A list of changes made by file below.

annot-categorical.vue

• Removed label attribute for v-select as it was unnecessary and producing a warning. value is used for showing what was just selected and retrieving what had been selected upon component re-mount
• Added component function selectOptionAndUpdate as we would like to avoid multiline attribute code

annot-continuous-values.vue

• Added component function selectHeuristic as we would like to avoid multiline attribute code

index.js

Formatting/streamlining

• Added a comment to describe the new annotation count store field
• Small streamlining of getColumnDescription, getHarmonizedPreview implementation
• updateAnnotationCount - Updated this function for a clean check of data type for the column followed by the annotation condition. This way we do not have to worry about cascading conditions.

Feature 390 - Initialization of specialized structures for data types

• alterColumnCategoryMapping - this has been rewritten to allow for the addition of special structures transformationHeuristic and valueMap in dataDictionary.annotated.<column-name>. Determination of which should be added is dependent on the category assigned to each column in dataDictionary.annotated.<column-name>.
• getHeuristic - transformationHeuristic property will now always be present for continuous values-categorized columns

Bug fix 386

• getSelectedCategoricalOption - used to determine via lookup of stored identifier in valueMap what the label for that identifier is
• selectCategoricalOption - 1) Deletes values from the value map for categorical columns if the annotated value is removed (blank vue select),
  and 2) Changes/adds the annotated value to the valueMap when an option is selected from the vue-select in annot-categorical
• setHeuristic - Either adds the heuristic from the drop down or deletes the heuristic for a column in annot-continuous-values

Test updates for the fix and feature

• store-getter-getHeuristic.cy.js
• store-getter-getSelectedCategoricalOption.cy.js
• store-mutation-selectCategoricalOption.cy.js
• store-mutation-updateAnnotationCount.cy.js

Any string referring to data table column in the repo now is called columnName

• alterColumnCategoryMap.cy.js
• column-linking-table.cy.js
• annot-continuous-values.cy.js
• annot-columns.cy.js
• column-linking-table.vue (In addition attributes for the b-table have been reordered.)
• annot-columns.vue

[rmanaem]

Requested two changes.
Regarding the docstring change, feel free to remove it if you think its presence is unnecessary.

[jarmoza]

@rmanaem Changes committed. Take a look.

[rmanaem]

👨🏼‍🍳