(core) Implementing row conditional formatting

Summary:
Conditional formatting can now be used for whole rows.
Related fix:
- Font styles weren't applicable for summary columns.
- Checkbox and slider weren't using colors properly

Test Plan: Existing and new tests

Reviewers: paulfitz, georgegevoian

Reviewed By: georgegevoian

Differential Revision: https://phab.getgrist.com/D3547

app/client/models/RuleOwner.ts

@@ -0,0 +1,41 @@
+import {ColumnRec, DocModel} from 'app/client/models/DocModel';
+import {Style} from 'app/client/models/Styles';
+import * as modelUtil from 'app/client/models/modelUtil';
+
+export interface RuleOwner {
+  // Field or Section can have a list of conditional styling rules. Each style is a combination of a formula and options
+  // that must by applied. Style is persisted as a new hidden formula column and the list of such
+  // columns is stored as Reference List property ('rules') in a field or column.
+  tableId: ko.Computed<string>;
+  // If this field (or column) has a list of conditional styling rules.
+  hasRules: ko.Computed<boolean>;
+  // List of columns that are used as rules for conditional styles.
+  rulesCols: ko.Computed<ColumnRec[]>;
+  // List of columns ids that are used as rules for conditional styles.
+  rulesColsIds: ko.Computed<string[]>;
+  // List of styles used by conditional rules.
+  rulesStyles: modelUtil.KoSaveableObservable<Style[]>;
+  // Adds empty conditional style rule. Sets before sending to the server.
+  addEmptyRule(): Promise<void>;
+  // Removes one rule from the collection. Removes before sending update to the server.
+  removeRule(index: number): Promise<void>;
+}
+
+export async function removeRule(docModel: DocModel, owner: RuleOwner, index: number) {
+  const col = owner.rulesCols.peek()[index];
+  if (!col) {
+    throw new Error(`There is no rule at index ${index}`);
+  }
+  const newStyles = owner.rulesStyles.peek()?.slice() ?? [];
+  if (newStyles.length >= index) {
+    newStyles.splice(index, 1);
+  } else {
+    console.debug(`There are not style options at index ${index}`);
+  }
+  await docModel.docData.bundleActions("Remove conditional rule", () =>
+    Promise.all([
+      owner.rulesStyles.setAndSave(newStyles),
+      docModel.docData.sendAction(['RemoveColumn', owner.tableId.peek(), col.colId.peek()])
+    ])
+  );
+}