Should make cypress less flake with two of our tests (elastic#104033)

## Summary

Should reduce flake in two of our Cypress tests.

* Removed skip on a test recently skipped
* Removes a wait() that doesn't seem to have been reducing flake added by a EUI team member
* Adds a `.click()` to give focus to a component in order to improve our chances of typing in the input box
* Adds some `.should('exists')` which will cause Cypress to ensure something exists and a better chance for click handlers to be added
* Adds a pipe as suggested by @yctercero in the flake test

### Checklist

- [x] [Unit or functional tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html) were updated or added to match the most common scenarios

x-pack/plugins/security_solution/cypress/integration/timelines/row_renderers.spec.ts

@@ -46,6 +46,7 @@ describe('Row renderers', () => {
     loginAndWaitForPage(HOSTS_URL);
     openTimelineUsingToggle();
     populateTimeline();
+    cy.get(TIMELINE_SHOW_ROW_RENDERERS_GEAR).should('exist');
     cy.get(TIMELINE_SHOW_ROW_RENDERERS_GEAR).first().click({ force: true });
   });
 
@@ -59,6 +60,7 @@ describe('Row renderers', () => {
   });
 
   it('Selected renderer can be disabled and enabled', () => {
+    cy.get(TIMELINE_ROW_RENDERERS_SEARCHBOX).should('exist');
     cy.get(TIMELINE_ROW_RENDERERS_SEARCHBOX).type('flow');
 
     cy.get(TIMELINE_ROW_RENDERERS_MODAL_ITEMS_CHECKBOX).first().uncheck();
@@ -75,8 +77,11 @@ describe('Row renderers', () => {
     });
   });
 
-  it.skip('Selected renderer can be disabled with one click', () => {
-    cy.get(TIMELINE_ROW_RENDERERS_DISABLE_ALL_BTN).click({ force: true });
+  it('Selected renderer can be disabled with one click', () => {
+    cy.get(TIMELINE_ROW_RENDERERS_DISABLE_ALL_BTN).should('exist');
+    cy.get(TIMELINE_ROW_RENDERERS_DISABLE_ALL_BTN)
+      .pipe(($el) => $el.trigger('click'))
+      .should('not.be.visible');
 
     cy.intercept('PATCH', '/api/timeline').as('updateTimeline');
     cy.wait('@updateTimeline').its('response.statusCode').should('eq', 200);

x-pack/plugins/security_solution/cypress/integration/urls/state.spec.ts

@@ -74,7 +74,6 @@ describe('url state', () => {
     waitForIpsTableToBeLoaded();
     setEndDate(ABSOLUTE_DATE.newEndTimeTyped);
     updateDates();
-    cy.wait(300);
 
     let startDate: string;
     let endDate: string;

x-pack/plugins/security_solution/cypress/tasks/date_picker.ts

@@ -21,15 +21,15 @@ export const setEndDate = (date: string) => {
 
   cy.get(DATE_PICKER_ABSOLUTE_TAB).first().click({ force: true });
 
-  cy.get(DATE_PICKER_ABSOLUTE_INPUT).clear().type(date);
+  cy.get(DATE_PICKER_ABSOLUTE_INPUT).click().clear().type(date);
 };
 
 export const setStartDate = (date: string) => {
   cy.get(DATE_PICKER_START_DATE_POPOVER_BUTTON).click({ force: true });
 
   cy.get(DATE_PICKER_ABSOLUTE_TAB).first().click({ force: true });
 
-  cy.get(DATE_PICKER_ABSOLUTE_INPUT).clear().type(date);
+  cy.get(DATE_PICKER_ABSOLUTE_INPUT).click().clear().type(date);
 };
 
 export const setTimelineEndDate = (date: string) => {