Fixed following issues for query tool after react porting:

1) Add New Server Connection > Server options keep loading(For empty Server group).
 2) After clicking indent/Unindent(for all operations) for large query option left as it is till operation completes
 3) Check sign beside options in Execute Option/Copy Header is little bit big
 4) In explain > Analysis tab does not show ROWS column
 5) In explain > Explain > analysis previous explain output is NOT cleared. New rows are appended. Same applies to the statistics tab.
 6) Update new query tool connection tool tip. Fixes #7289
 7) Explain-Analyze > Loops column is empty.
 8) Explain-Analyze with Verbose & Costs > in ROW X columns upward arrows are missing.
 9) Explain-Analyze with all option checked > background colors are missing for timing.
 10) Explain-Analyze > Additional bullet is added before Hash Cond.
 11) Browser Tree > Filtered rows icon is not working.
 12) Create table with timestamp and default value as function now() > Add new row > Enter mandatory columns except column where default value is function(now()) > Click Save > New row added but column with default value has value [default]. not updated to actual value. / Default values are not considered for any column while adding a new entry.
 13) Disable execute options in View/Edit data.
 14) The Boolean column always shows null.
 15) In Query history Remove & Remove all buttons are stuck to each other.
 16) On Remove all, the right panel is empty.
 17) Create a column with boolean[]/ text[], Try to add a new entry from data grid, enter “” quotes > Click Ok > Now try edit cell > You can not change value.
 18) In query history - Select queries are suffixed by ’Save Data’ icon
 19) Edit any table with PK > Try to insert duplicate PK > Error thrown > Correct pK value > Still old error shown > Not able to add new entry (This works when focus is moved from edited cell)
 20) Clicking arrows after opening dropdown options, does not collapse dropdown.

refs #6131

web/pgadmin/browser/static/js/toolbar.js

@@ -116,7 +116,7 @@ export function initializeToolbar(panel, wcDocker) {
     else if ('name' in data && data.name === gettext('View Data'))
       pgAdmin.Tools.SQLEditor.showViewData({mnuid: 3}, pgAdmin.Browser.tree.selected());
     else if ('name' in data && data.name === gettext('Filtered Rows'))
-      pgAdmin.Tools.SQLEditor.show_filtered_row({mnuid: 4}, pgAdmin.Browser.tree.selected());
+      pgAdmin.Tools.SQLEditor.showFilteredRow({mnuid: 4}, pgAdmin.Browser.tree.selected());
     else if ('name' in data && data.name === gettext('Search objects'))
       pgAdmin.SearchObjects.show_search_objects('', pgAdmin.Browser.tree.selected());
     else if ('name' in data && data.name === gettext('PSQL Tool')){