pgAdmin 4 commit: Wait for the Tools menu to be populated when running

Wait for the Tools menu to be populated when running the feature tests, instead of failing.

Fix by Khushboo, based on Harshal's previous work.

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=6b6d3369b31547f5042428a579aa92a1726ba7b5
Author: Khushboo Vashi <khushboo(dot)vashi(at)enterprisedb(dot)com>

Modified Files
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.../feature_tests/pg_datatype_validation_test.py | 4 +---
.../feature_tests/query_tool_journey_test.py | 5 +---
web/pgadmin/feature_tests/view_data_dml_queries.py | 1 -
web/regression/feature_utils/pgadmin_page.py | 27 ++++++++++++++++++++++
4 files changed, 29 insertions(+), 8 deletions(-)