Add caseSensitive option for combofields, use for source=*

(closes #4558)

data/presets/fields.json

@@ -1738,6 +1738,7 @@
             "universal": true,
             "label": "Sources",
             "snake_case": false,
+            "caseSensitive": true,
             "options": [
                 "survey",
                 "local knowledge",

data/presets/fields/source.json

@@ -5,6 +5,7 @@
     "universal": true,
     "label": "Sources",
     "snake_case": false,
+    "caseSensitive": true,
     "options": [
         "survey",
         "local knowledge",

data/presets/schema/field.json

@@ -115,6 +115,11 @@
             "description": "If true, replace spaces with underscores in the tag value (combo type fields)",
             "type": "boolean",
             "default": true
+        },
+        "caseSensitive": {
+            "description": "If true, allow case sensitive field values (combo type fields)",
+            "type": "boolean",
+            "default": false
         }
     },
     "additionalProperties": false

modules/ui/fields/combo.js

@@ -37,8 +37,10 @@ export function uiFieldCombo(field, context) {
         optstrings = field.strings && field.strings.options,
         optarray = field.options,
         snake_case = (field.snake_case || (field.snake_case === undefined)),
+        caseSensitive = field.caseSensitive,
         combobox = d3_combobox()
             .container(context.container())
+            .caseSensitive(caseSensitive)
             .minItems(isMulti || isSemi ? 1 : 2),
         comboData = [],
         multiData = [],