add searchable raw table to population characteristics tab in estimation module

[jamieweaver]

currently the population characteristics tab includes a before and after ps adjustment "pretty" covariate balance table:

it would be great to add a raw vesrion of the same covariate balance table where a user can search any covariate of interest. example:

here's an active example: https://data.ohdsi.org/Covid19EstimationHydroxychloroquine/ code here: https://github.com/OHDSI/ShinyDeploy/blob/master/Covid19EstimationHydroxychloroquine/server.R#L376-L407 https://github.com/OHDSI/ShinyDeploy/blob/master/Covid19EstimationHydroxychloroquine/PlotsAndTables.R#L363-L407

@azimov @jreps @davekern

[jreps]

This has been updated and now lets you search covariates :)