Fixed a bug which can cause the ROM browser to crash if RMG is closed while the ROM browser is loading.
Removed the need to temporarily save and then restore the config file's "Columns" setting when updating the column sizes in "on_RomBrowserThread_Finished".
Rearranged some code in "on_RomBrowserThread_Finished" to make the above change work.
Fixed a bug which can cause the ROM browser to crash if RMG is closed while the ROM browser is loading.
Removed the need to temporarily save and then restore the config file's "Columns" setting when updating the column sizes in "on_RomBrowserThread_Finished".
Rearranged some code in "on_RomBrowserThread_Finished" to make the above change work.