Log level "Warn" cleanup

[Dillon-Brown]

Description

This fixes the suitecrm.log from getting filled with spam when set to log level "Warn". This should solve all warning mentioned by @pgorod in #3401. In total:

• Image List.gif not found
• Image Create.gif not found
• Image View_Email_Templates.gif not found
• Image Schedule_Meeting.gif not found
• Image Schedule_Call.gif not found
• Image Resource_Chart.gif not found
• Image View_Project_Tasks.gif not found
• Image Create_Person_Form.gif not found
• Image View_Create_Email_Templates.gif not found
• Image View_Diagnostics.gif not found
• Image Create_Security_Group.gif not found
• Image Create_Contact_Vcard.gif not found
• Image View.gif not found
• Image View_Process_Audit.gif not found
• Image Today.gif not found
• Image CREATEOutboundEmailAccounts.gif not found
• Image EmailMarketing.gif not found
• Image Role_Management.gif not found
• Image Quick_Radius_Map.gif not found
• Image Create_Lead_Vcard.gif not found
• Image List_Maps.gif not found
• Image icon_Administration_32.png not found
• Image icon_EmailMan_32.png not found
• Image icon_Home_32.png not found
• Image icon_UpgradeWizard_32.png not found
• Image icon_InboundEmail_32.png not found
• Image _image_inline.gif not found
• Image png_image_inline.gif not found
• Image icon__32.png not found
• Image sub_panel\EmailMarketing.svg not found
• Image icon_loading.gif not found
• Image sidebar/modules\InboundEmail.svg not found
• Image select.gif not found
• Image clear.gif not found

Motivation and Context

Issue reference: #3401
Issue reference: #3038

This PR also replaces #4169, #3401, #3398

How To Test This

1. Set log level to "Warn".
2. Check that the log is not spammed with "Image not Found".
3. Check that the sidebar and sub-panel icons are visible.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Final checklist

• My code follows the code style of this project found here.
• My change requires a change to the documentation.
• I have read the How to Contribute guidelines.

[pgorod]

My logs keep asking for this PR to be merged

Fri Feb  2 15:11:02 2018 [31564][1][WARN] Image List.gif not found
Fri Feb  2 15:11:02 2018 [31564][1][WARN] Image Create.gif not found
Fri Feb  2 15:11:02 2018 [31564][1][WARN] Image List.gif not found
Fri Feb  2 15:11:02 2018 [31564][1][WARN] Image Create_Security_Group.gif not found
Fri Feb  2 15:11:02 2018 [31564][1][WARN] Image Create.gif not found

:-)

[daniel-samson]

Assessed