friendlier variable names; use sliders for input

frontend/src/pages/HistoricalCalendarPrices/state.ts

@@ -7,14 +7,14 @@ export const popperContent = signal(null);
 export const availableUnderlyings = signal([]);
 export const underlying = signal(null);
 
-export const daysToFrontExpiration = signal(14);
+export const openDTE = signal(14);
 
-export const daysBetweenFrontAndBackExpiration = signal(14);
+export const span = signal(14);
 
-export const strikePercentageFromUnderlyingPrice = signal(1);
-export const strikePercentageFromUnderlyingPriceRadius = signal(1);
+export const moniness = signal(1);
+export const moninessRadius = signal(1);
 
-export const exitToFrontExpiration = signal(2);
+export const exitDTE = signal(2);
 
 export const stockPriceChartData = signal([]);