Use QStandardPaths::locateAll to locate all font directories #446

Job	Run time
Linux (GLideN64 (x64 Mupen64Plus-CLI))	3m 1s
Windows (GLideN64 (x64 Project64-Qt))	7m 37s
Linux (GLideN64 (x64 Mupen64Plus-Qt))	2m 32s
Windows (GLideN64 (x86 Project64-Qt))	7m 14s
Windows (GLideN64 (x64 Project64-WTL))	4m 53s
Windows (GLideN64 (x86 Project64-WTL))	5m 56s
Windows (GLideN64 (x64 Mupen64Plus-CLI))	5m 26s
Windows (GLideN64 (x86 Mupen64Plus-CLI))	4m 36s
Windows (GLideN64 (x64 Mupen64Plus-Qt))	6m 23s
Release	0s
	47m 38s

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