tests failing on osx

[Tanish Grover]

• test_insert_point in test_sideview.py failing due to invalid coordinate. The problem exists due to different window sizes on different machines
• test_mscolab_project.py failing due to error in _activate_project_at_index. This requires a mouseDoubleClick instead of enter key press
• test_server_service_cache in test_wms_control.py failing because get capabilities button is not pressed after writing the correct URL in wms url box. This leaves the retrieve button to remain disabled.

‌

[Reimar Bauer]

fixes issue #549, tests failing on osx

→ <<cset 9cdc2ffb7490>>

[Reimar Bauer]

Merged in tanish19/mss/fix_tests_osx (pull request #800)

fixes issue #549, tests failing on osx

→ <<cset 5fbb79f0974b>>