refactor: enter fires query, "o" opens a datasheet

This will help make the searching more useful since firing a slow query
on an incomplete search term will be no bueno. So, we let the user hit
Enter and confirm a search query when doing content queries.

gshmm.go

@@ -218,8 +218,8 @@ func filterDatasheetContents(m model) []string {
 	//       wait for datasheetsLoaded to go true
 	//       then iterate m.datasheets and index them
 	//
-	//       for this function, catch 3 chars or more in the textinput
-	//       start the query, fire the spinner and block any other queries
+	//       for this function, wait until Enter is hit to fire the query,
+	//       run the query, fire the spinner and block any other queries
 	//       coming in. return the list hits that come back from the query
 	return []string{}
 }
@@ -294,7 +294,7 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 			return m, tea.Quit
 		case "tab":
 			m.toggleFilterMode()
-		case "enter":
+		case "o":
 			selectedDatasheet := m.datasheets[len(m.datasheets)-1]
 			// TODO: handle error
 			_ = xdg.Open(selectedDatasheet.absPath)
@@ -336,7 +336,7 @@ func (m model) View() string {
 	}
 	body.WriteString("\n" + mode)
 
-	help := "[ctrl-c]: quit | [tab]: filter mode | [enter]: open"
+	help := "[ctrl-c]: quit | [tab]: filter mode | [o]: open"
 	body.WriteString("\n" + help)
 
 	return body.String()